Hiya Mark,
Yes, that’s my double carport, aka tent in the front garden! Connie just loves seeing these every time we get home! (Head in hands emoji!)
The company to use is Gala-Tents and you are looking for their biggest diameter frame Pro 50 or such like. Essentially it is the most expensive one they do, the 6m x 3m one was about £600 from memory, the 4.5m x 3m one was about £500. However, it will come with a green (you can pick your colour) lightweight canopy which will fail in about 3 years. The best quality replacement is from a company in Staffordshire / Walsall way I think and again you are looking for their high quality canopy (about £150 ish from memory), it will last much longer than the original canopy supplied by Gala-Tents.
I’ll try to post some links.
https://www.galatent.co.uk/shop-gazebos
When I bought mine the Pro 50 was the best but now there is a Pro 60, which is what I would go for, you want the strongest you can get!
I tether mine down with a combo of leg weights, ratchet straps and ground anchors, both spreading bolt type and large cork screw type ground anchors.
The replacement canopy I get from here, you will love this photo!
There you go, told you, you would love it!
I find these shelters excellent and I’ve had them up (to Connie’s delight) since 2015. I drop the height when the clocks go back and I raise them again when the clocks go forward. This is to make them less vulnerable in the storm season. So far no issues other than having to clear snow with a broom in the winter.
Cheers, Giles