Welcome! I ordered my bimini through GMI and have been happy for the most part. My only complaint is that the stock side mounts don't work well if there is any type of angle to the side of the boat, but I think any place sends these out standard. I had a few questions in this territory about a year ago, most of which may be posted under the Boat Accessories topic
Since you're in the UK, there may be local places that can avoid the shipping cost.
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-Rob.

Current boat: 2011 Yamaha AR210
Previous boat: 1998 Horizon RX 4.3GL SX