From
www.amazon.co.uk I got the "Times Psychometric Tests Volume 1" CD. This covers mechanical, numerical and verbal reasoning tests (not personality). Doing the numerical one once a day has considerably sharpened my mental arithmetic. The verbal reasoning ones are the hardest and very hard if you only give yourself enough time to read the passage once!!
Alternatively vists
www.emode.com for IQ and personality tests. However, I think these are light weight in comparison to the tests the Airlines will put you through!