Hi Sparx,
These are topics that were covered on my CPL. A variety of topics but none in too much detail thankfully. The examiner usually just wants to establish that you are switched on.
Weather
When you go to the exam centre have the latest, 214 and 215 Met charts and latest Metars and Taf printed out if possible. Make sure you have given these charts a good eyeing over and be prepared for possible questions about what the weather is currently doing; what weather you can expect on route and whats expected later that day. Write down the frezzing level on your plog and throw it into the Ice Brief before start could earn you a few free brownie points.
Royal Flights
A simple phone call to the free phone number. Costs you nothing but could save you 700 + pounds.
Notams
Print out the latest Notams for the airports in the area you are doing the flight. Trying to track a VOR or NDB on TST on the day, could be embarassing and could result in an expensive day out. Remember its the simple things that get most people!
Performance Calcs.
Performance Calculations, be able to explain how they are factored - Jar Ops 1 Sub Part H a worth while read.
Mass and Balance
The usual. Be able to converse the basics with out bull !!!!!ing.
VFR Rules of the air
Know your VFR air law flight rules, such as height rules for flights over built up areas, rules for staying clear of clound horizontally and vertically. A-G airspace rules and VFR privledges of a CPL and rules for flights over water.
As you can from the above the usual suspects in terms of topics.
Nothing too fancy. Easy to pre prepare for! Knowing these off the tip of your tongue will reduce the stress on the day and allow you to concentrate better on the task in hand.
Good luck with the test!
Matrix777
