You would need one at Old Oak Common as well!

Leapt upon by Stop HS2^▸ (The next High Speed line(s)) unsurprisingly:

https://stophs2.org/news/19849-stop-hs2-reacts-to-shambles-at-hs2-and-news-that-hs2-into-euston-could-be-scrapped

To save you the bother of reading the article, the last sentence sums it up:

There’s little point making comparisons on ride quality unless it’s on the same track, the same relative position within the carriage, and at the same speed.

They’ve got some monitoring equipment there, so I’m guessing they can keep a good eye on it remotely.  Could go back up to a 50mph restriction if a bit of tamping is done perhaps?  But certainly not back up to line speed until the work detailed is undertaken.

A bit more information on plans to sort out the bridge from a Network Rail Asset Engineer:

There's been rumblings of quadrupling over the last thirty or so years, most recently south from Oxford as far as Radley, but nothing has gone beyond the aspiration stage.  Anything beyond that, including cut-offs, would be very expensive and therefore probably unjustifiable.  Four tracks south from Oxford to Radley, and grade separation at Didcot and possibly a reversible loop line between Didcot and Appleford Junction would be much more suitable IMHO^▸ (in my humble opinion).

I doubt the money will be forthcoming in the near term for anything though.

Perhaps it meant that with temperatures dipping as low as -9 over the previous few nights, including last weekend, temporary repairs to remove the 20mph restriction (and therefore prevent any further marked deterioration resulting in the report of a rough ride last night) weren’t able to be done.

Alarm in the sense there will be a lot of disruption tonight and potentially into the future - YES
Alarm in the sense a bridge slowly sinking is likely to be a serious passenger safety issue - NO

Nuneham Bridge near Culham has been slowly sinking into the banks of the Thames for years.  A 50mph speed limit became 20mph a few weeks ago, but a driver reported a rough ride even at that speed so it’ll need an inspection before reopening and it’s in the middle of nowhere!

Was that the one that was known as 'Tribute'?  I remember them - great big things and very slow (compared with APTIS^▸ (All Purpose Ticket Issuing System)) and they didn't last long!

I can almost hear the good folk of Skelmersdale revving their engines in anticipation! 

It's not a utopia, but it is still very significant.

The residents of those locations, particularly when you are talking about the North West, North Wales and Scotland, already have superfast trains into London.  At least when compared to how long it would take to drive to a Rugby Parkway equivalent located on the main lines and not the Northampton lines.  In some cases superfast trains that are going to get even superfaster when HS2^▸ (The next High Speed line(s)) opens.

If it did happen you'd probably by Watford Gap would be best, as the M1 is right alongside and you have the added bonus of being closer to Daventry and its 28000 (and set to grow further) residents?  Perhaps it might become a better option then when there's much less pressure on the WCML^▸ (West Coast Main Line) and you could offer a decent timed Euston/Watford/Milton Keynes/Hemel Hempstead/Daventry Parkway/Rugby/Coventry/Birmingham International/Birmingham New Street service twice an hour?

I think it’s the location.  Two trains an hour, and not an especially quick route into London via the quite slow Northampton route - half an hour slower than from the current Rugby station.  That’s not to say that Rugby Parkway won’t be a good asset though.

Chiltern made a couple of quite ‘ambitious’ suggestions back in the day that were never likely to materialise.

On a recent trip on a loco hauled set from Wrexham, the legacy reservation system for the ex-ECML^▸ (East Coast Main Line) carriages were telling me that my seat was reserved from Kings Cross!

Yeah I thought it was for cabling.  As you say it looks more like for water or sewerage!