You can get the screen replaced, however it is rather expensive due to the waterproof nature of the camera.
Depending on if the LCD screen itself has cracked, or the case (plastic part which covers the screen).
A typical price for the screen (parts and labour) is £90, if its the case as well your getting on to £150, at which point its cheaper to replace the camera.
If you would like me to recommend a repair centre to have the repair done please let me know your postcode.
I have used Direct Camera Repairs (01483 200639) in the past, they are a postal based company, but they are very efficient and can generally turn around repairs within a week.
In terms of locality wise we would normally suggest Jessops but there doesnt appear to be one in your area, for this reason would suggest you use an independent firm called Photo Professional, their number is *****(###) ###-#### and believe they are based in Poole.