http://www.amazon.co.uk/Electrical-Installations-Technical-Certificate-Book/dp/0435401998/ref=sr_1_33?ie=UTF8&s=books&qid=1260036984&sr=1-33
im on year 2 of 2330 and found this book excellent.
Have you annoyed Edmundsons by any chance?!? Either that or there just trying to rob you mate. Mem MBH140 mcb is between £8 - £14
Pods are a lot more but you should get both for £50-60 max
The reason i know this is because i buy the stuff at a wholesalers (not saying which one :-) )