If I'm studying in Medway, can I go on placement with the London Ambulance Service (LAS) and vice versa?

No, you have to stay within the same trust. So, students based at Avery Hill take their ambulance placements with the London Ambulance Service (LAS), and Medway students go out with the South East Coast Ambulance (SECAmb). It isn't possible to change your NHS ambulance trust.