There has indeed been significant extra capacity added, though it is hard to fully appreciate this when standing on a 5 car unit.

I can see two ways in which further capacity could be added.
Firstly, lengthen the  9 car IETs^▸ (Intercity Express Train) to 10 car. A 10 car unit should fit everywhere that can take a 5+5  since the length would be identical.

A more radical suggestion would be to restore to use the extended platform one at Paddington, formerly used for Motorail services. That would permit of a few double length trains in the peak. 9+9 or 10+10 IETs or whatever replaces them. Fast to Taunton where the train could divide. Front portion limited stop service to Penzance, rear portion all principle stations to Plymouth would be one possibility.
A small number of double length trains, perhaps five or six in the peak two hours, would provide considerable extra capacity.

If anyone is concerned by the scarcity of alcohol based hand sanitiser and the often inflated prices of remaining stocks, it is easy enough to make your own.

One suggested formulation is as follows.

Isopropyl alcohol-----------------------75%
Hydrogen peroxide solution-------------4%
Glycerine---------------------------------1.5%
Purified water to 100%

The isopropyl alcohol should be virtually pure, not the formulation already diluted with water.
The hydrogen peroxide presumes use of a solution containing 3% of the active ingredient, other concentrations may be used if the volume used is adjusted accordingly. The purpose of the peroxide is to kill anything in the original ingredients.
The glycerine should be of cosmetic or food grade, its purpose is to prevent excessive drying of the skin.
The water should preferably be distilled or de-ionised, but boiled tap water may be used, if of drinking quality.

If only "rubbing alcohol" is available which consists of 70% isopropyl alcohol and 30% water, then this may be used but is not ideal. Add about 2% glycerine. Add no water to rubbing alcohol.

Isopropyl alcohol, glycerine, and hydrogen peroxide are all readily available on line.
The isopropyl alcohol and the glycerine store almost indefinitely in sealed containers, but the hydrogen peroxide spoils in storage.

Edit to add, the above was true when posted, but isopropyl alcohol is now in short supply and very expensive when located.
Ethanol is an alternative but requires a slightly different mix, details a few posts down

TAKE CARE isopropyl alcohol is very flammable, and when diluted as described is still somewhat flammable. Best handled outdoors.

Bulk buying from trade suppliers that primarily supply institutions is generally cheaper than buying from supermarkets. Also more convenient as one large carton is far easier to store and handle than loads of smaller packages.

Other purchases are from a supermarket home delivery service. I think nothing of purchasing relatively large volumes when prices are attractive.
As an example I enjoy a certain brand of chocolate biscuit, but try to limit myself to two packs a week. Some people would buy two packs each week, but I think nothing of purchasing a dozen or twenty packs when reduced in price. These often last until the product is next reduced in price.
Similar arguments apply to most non perishables.

Whilst I am sorry for those thrown out of work, and those whose travel plans have been disrupted, taking the wider view the failure of another airline is good news for the environment.
If we are serious about the climate emergency, we need to fly less and not more. Air travel is very carbon intensive and likely to remain so.

Hopefully some people will now fly less, making use of rail instead, or even staying in one place.

Some of the routes formerly operated by Flybe will presumably be taken over by competitors, but others may close permanently. Those who flew infrequently may have to accept the extra time taken by rail.
Those who flew frequently might have to review their location and business affairs so as to reduce the need for such frequent long distance travel.

Despite my misgivings about some recent changes, I am pro-rail. The rail industry does IMO^▸ (in my opinion) need to improve its long distance offerings, not just in terms of journey quality, but also in terms of what through services are available.
Time perhaps to consider a return of sleeper services between say the southwest and the north or Scotland.

Rail services involving changing are inherently less popular than through services.
A through train from say Plymouth to say York would be far more attractive than changing in London.

I have counted my toilet rolls and confirm that I have 221 rolls. 2 large cartons each containing 108 rolls, and 13 loose rolls.
1 carton of 108 rolls lasts very roughly a year. I re-order when down to roughly one carton.

In railway employment, I suspect that CARRYING vodka would be looked at with very considerable disfavour. Even if it was for hygiene purposes rather than for drinking.
Non potable alcohol would be better. Isopropyl alcohol is non potable and still readily available, not certain if use of same could give a "false positive" on a railway alcohol test.

Alcohol based hand sanitisers usually contain about 70% alcohol, popular brands of vodka are 37.5% or 40% and may therefore be less effective.

 I Don't smoke.
Drink only in moderation.
Fairly balanced diet.
Don't take illegal drugs.

Lacking regular exercise.
Weight is excessive.
Eyesight and hearing not as they used to be.
If I was an orse, they would shoot me.

It depends upon WHEN the stockpiling was done.
To buy extra supplies at the last minute is anti-social as others are thereby deprived. I avoid doing this.
To stock up in good time hurts no one else and simply provides a little welcome extra trade for the supplier.
I purchased a bulk stock of isopropyl alcohol some years ago, it keeps almost indefinitely. It should be diluted 70/30 with water for use as a hand and surface sanitiser.
Washing hands with soap and warm water is good, for this reason I have several means of heating water, loads of soap, a case of disposable hand towels, and a dozen or so spare re-useable towels. All obtained years ago, not during any panic and not depriving anyone else.

Likewise if power cuts become a regular feature, panic buying of candles is likely. I have hundreds of candles purchased years ago, no one else was thus deprived.

The present death toll from the virus is less than those killed on the roads.
This should not lead to complacency though. There is no reason to fear a large and sudden increase in road fatalities, but the coronavirus does have the potential for much wider spread and significant mortality.

Part of the problem is that many people "cant do numbers" and would be reassured by a death rate of "under 1%" but be horrified by a death toll of "nearly half a million" and are unable to grasp that both could be true.

Details of defensive arrangements are not posted on a public forum.
Details of a modest and entirely legal petrol supply provoked enough concern.

I keep a reasonable reserve of many supplies for use in the event of any emergency, including but not limited too, extreme weather, industrial disputes, utility breakdown or failure, civil disorder, a 1929 type financial crash, terrorist attack, war.

Non perishable foods including dried pasta, canned goods, and 25 year shelf life doomfood.
Bottled water, chlorine tablets for disinfecting rainwater.
A few tons of logs, and a reserve of anthracite*.
A few cylinders of propane*. LPG^▸ (Liquefied Petroleum Gas) boiling ring and LPG heater.
Batteries.
Paraffin*.
Candles*.
A reserve stock of clothes and bedding, beyond those items in regular use.
Defensive equipment.

As society becomes more vulnerable to out of course events, and more reliant on IT, which in turn relies on electricity, it is prudent to be prepared.

*I avoid use of these fossil fuels whilst times are normal, but consider a stock to be prudent.

Sensible in my view, toilet paper shortages are entirely possible due to sickness in the supply chain. Food and water are higher priorities, but toilet paper is also important.
I buy it in bulk, and order more when existing stocks are down to less than 100 rolls.
My present stock is about 200 rolls. No panic here.

It all sounds very impressive, and yet I and many others report standing on a 5 car DMU^▸ (Diesel Multiple Unit) when we would have got a seat on an HST^▸ (High Speed Train).

There seems to be a general view that we are stuck with hard seats, limited luggage space, and no buffet for the next 25 years, in the name of progress. Perhaps we will soon be told that the "odd" short formation is also part of the deal, and that really things are so much better in general, that the odd short form does not really matter.

If comparing seat numbers rather than numbers of vehicles, I suspect that a broadly similar result would be obtained, of very roughly 30% more seats.
(IET^▸ (Intercity Express Train) coaches are longer, but also have a lot of wasted space in the end vehicles)

Nevertheless, no matter how many impressive sounding figures are produced, we are still seeing many overcrowded 5 car units on services previously worked by an HST^▸ (High Speed Train), and for which full length IETS were promised.
Most of these short formations are reported as being due to "more trains than usual needing repairs" A minority are due to lack of staff.

And this well over two years after introduction.

In most countries, including the UK^▸ (United Kingdom), electric railways are "priority customers" and wont normally be cut off due to a shortage of generating capacity.
This however does NOT give immunity against being cut off for non payment.