Have you specified a bike or trike on a manufacturer’s own configurator? You can order it here, use the currency converter at the bottom of the page if you have to convert Euros into Pounds.
Note: Because of Brexit, bikes and trikes from HPVelotechnik and Hase now have 14% UK import duty added to the cost. R&M electric bikes and ICE trikes do not have this. I’ll recalculate the total when you order.