Recovery here is a vehicle that cannot be driven: a shattered tyre, a seized wheel, or a car stopped on one of the three roads onto the island. The price is agreed before the truck is sent. There is no workshop at the far end unless you name one.
Bridges, the ferry approach, and the M27 slip at Junction 12 all have their own constraints. A car on Eastern Road is not the same as a van in a lane behind Wickham (Hampshire). Describe the ground.
This business has drivers, not a chain of depots. Recovery still starts from Portsmouth. A job that sits outside the published callouts is a no.