
Impsport used to be the go to for many groups, but then we didn't have forums or the internet. Impsport are still probably a good balance between quality and value. We used them in the past but their minimum order requirements changed and our group just wasn't ordering the quantity to make it viable. On the recommendation of another CTC group, we changed to Gear, I think we've had two orders from them, but none in the last few years. UK company, manufacturing in Pakistan, we asked about eco and ethical policies and they're members of Sedex, you can make your own mind up about that. They are very easy to deal with, they'll apply the volume discount even to mixed orders, they can send out samples for sizing, quality is reasonable, without being exceptional, maybe a touch lower than Impsport, but their sizing is more consistent. We had a previous design and they matched it perfectly. Lead times were reasonable and accurate. I think our last order was about 40 garments, over about six lines, no one had any complaints that I know of. Only criticism I have it their logo is more prominent than I'd like, the same criticism applies to some other manufacturers, they will leave it off for a fee.
https://gearclub.co.uk/
If you want top quality and British made, there's Godfrey in Nottingham, we considered them, but the price difference was too much for some.
https://godfrey.co.uk/collections/godfrey-bikewear