I know I'm a 'noob' but just thought I'd reply as I see you're in Liverpool!
Manchester has a couple of great shops!
I apologise in advance if posting links isn't allowed on these forums, please don't ban me :-)
Motorcycle battery | Motorcycle Parts | Motorbike Accessories | Motorcycle Tyres Shop Locator | Hein Gericke
Also, I found going to google maps, going onto the 'find businesses' tab and typing in 'motorcycle clothing' then the area you want, so type Liverpool or Manchester, and then letting it search is really useful. It places dots on the map so you can see where all the businesses are, and then plan your way around the shops that are close together so you can see like 5 or more shops in a couple of hours easy!
Let me know if you want me to expand, it's nearly home time and I get to ride again so I'm excited and rushing :P
Andy