Iphone 4 dropped and i cracked the back of it, can this be replaced?

Where in Glasgow can I get this done?

Yes. The iPhone 4 back can be replaced. Just find a phone repair shop near you.

Yes get it from amazon it's cheap to replace

Mhmm. It can, definitely. Just go to a nearby phone/repair store.

Mine cracked and I got one on ebay for like 4 bucks, they are different for GSM and CDMA, I assume you have a GSM iPhone 4 in Glasgow. Make sure you buy the correct one. Most come with a little screw driver, only 2 screws hold on the back and can be seen from the bottom by the dock.take them out.push the back "up" about 2 mm with your thumbs, it comes right off.replace back in same way and put screws in and voila! Done!

At an actual Apple store. Expect to pay a good amount out of pocket for that.

Yah! Go to the Apple store