I agree with rudestuff.
I would also point out that there are no "specific nuances" for the UK - they follow the EASA database, although some of their questions have been modified/removed for common sense and clarity. The bits you might have a problem with would be operational procedures and air law, which are the most important when joining a company anyway.
With reference to databases, be aware that they don't have everything and much of the feedback that they use is wrong anyway.