The latest information coming from the UK dealerships is that the refreshed model S (the one with the weird steering wheel) will hit the UK at the end of 2023.
Tesla are taking orders now, rumoured to cost £73k and the deposit is the fully refundable £100.
Other models that are currently available now have a deposit of £200. Which probably accounts for the fact that most clued up individuals know that their “non refundable deposit” is fully refundable under the UK distance sales agreement, since delivery of the car hasn’t even been taken there is no question that it is fully refundable – however please confirm this with your lawyer.