VW Transporter T5 (not 5.1) compatible remotes are £85 supplied, cut and programmed (until 1 Jan 24). If you lose all keys/remotes it will cost you more to get one done so it’s worth getting a spare if you’ve only got one.
You can choose from a variety of different styles. You can even choose Audi, Bentley, Ford (why would you?) and others.
If you just want a transponder key (chip but no remote) as a back up they are £55. (That compares to about £200 from most dealers).
If you don’t want another key but have simply locked your keys inside, we can help with that too.