Mercedes-Benz GLA new car order - can I get my deposit back?

In early December I ordered a Mercedes GLA. I have still not been given a build date and have read stories of 40+ week waits for some customers. I’m happy to sit tight for now but at what point can I say...

Can I get a refund on a deposit if I cancel my new car order?

I've placed a new car deposit of £1000 for a Land Rover Discovery Sport. The build date is end of August and delivery is mid-September. Due to a change in circumstances, I need to cancel the order. What...