Also, a page on them from 'Show me the journey' which usefully shows that like rest of the class 80x the cycle storage may be a struggle - and also, these being 5 carriage sets, with two joined together, this means the need for staffing - train managers for both sets and also to provision the pair of on board shops that that implies
They’re largely replacing the fleet of 5-car trains Class 221s which have run under the same ‘double crew’ arrangements for many years, though if it’s the same as
GWR▸ you don’t need two train managers, just one
TM▸ and one ‘competent person’, usually the lead host.
There are also the ten 807s being built which are 7-car units.