All Canons EF ( and EF-S lenses) are compatible. There is also a wide range of Tamron, Tokina , Sigma and other well regarded 3rd party lenses varying in price and quality
Before going to "Jessops", ( A good suggestion BTW I went a few times and still pop in from time to time) It is worth asking yourself why you want the lens
Is it to replace the kit lens : Ie a better all purpose lens?
To get better Wide angle?
Better zoom?
A portrait lens?
Lowlight ( ie IS or "fast" lens?)
Close ups:macro
Unless you dont mind the kit lens, you will probably be using its replacement most of the time
No one lens can doit all and even those that are versatile will have strengths and weaknesses
These questions are impt as the variety is bewildering and the prices are just as varied: ( imagine a child let loose in Toys R uS

)
There are Threads with all these type of questions the forums to help you before you set out to Jessops. Your time there will be better spent armed with some knowledge.
Even if there is a forum member around you, His/her shooting style and subjects of interest may be different from yours and they would be less likely to have access to the variety that Jessops do.
I would certainly be happy to let you have a play with my little collection but I live in Uxbridge!