One of the student I work with is interested in studying medicine in the UK. Here's a summary of our discussion on UKCAT we had recently.
UKCAT is an admissions test required by 26 top medical schools in the UK.
Online test prep resources offered by Medify are pretty good. For more information check http://www.medify.co.uk/ukcat
The UKCAT isn't easier than the practice books so practicing as many questions as possible will help a student prepare better.
Important testing information: You can only take the test once in any test cycle. If your application to medical school is not successful and you re-apply the following year, you then have to take the UKCAT again.