Safeguard's Clay Lane site is already quite tightly packed overnight. As well as the Ridgemount site, which despite having discs is now very much a car garage, it also incorporated a small allocation of coaches from Martlands Industrial Estate nearer Woking, and the car park alongside the railway near the University. Could probably physically squeeze a few extra vehicles in, but not a great number. That said, I'm not sure how full the Farnham Coaches site in Ewshot is, so there could potentially be the possibility of reallocating some coaching activity there to make some additional space at Guildford?
I think you will find that the Marlands site is no longer used since Clay lane opened, as you say Ridgeway is now a car servicing/sales business, the car park by the railway is now a building site for new housing.
The Ewshott site is literally a few metres inside the Hampshire/Surrey border and thus has a separate O licence in the western traffic area, minimum 30 minute drive to Guildford for a bus.
The deciding factors in any existing business trying to take over all or some of Arrivas operations is: -
1. Driver availability.
2. Depot space (including maintenance facilities).
Stagecoach probably have a little slack at Peasmarsh, perhaps 5-6 vehicles, they could possibly operate the 34/35 from Aldershot.
Outstations? Well there is an industrial estate at Normandy, Edward Thomas park a few school coaches there.
I would imagine that White buses Horsell outstation would be well placed to operate some of the Woking routes, if they could staff it?
An operator could in theory outstation a small number of vehicles in the Friary bus stn (Arriva already have this on their O licence) but would require a security guard as vehicles would probably be vandalised over night.
Reptons would be well placed to operate the 479 from their Bookham depot but they would need at least another 4 buses, could they staff it? (I think they only operate @ 10 vehicles currently).
The appeal of Falcons bid is that Arriva would not have to pay out large redundancy payments, presumably 'TUPEing' all staff across.
If the bid falls through, then in theory there would be a lot of staff looking for jobs but as per the national news, some might decide to leave the bus industry, many would seek out a new employer who pays the best rate/best T & Cs.
The nightmare for Surrey County Council is that some commercial routes might not attract any interest as potential operators cannot staff/house enough vehicles.