Ok mate.
Fully Comp is the same as Comprehensive.
Excess is a figure insurers add to your policy in order to save themselves money against your claims, and subsequently, lower the price of your premium. It represents the initial amount payable by yourself before the insurance company will step in to help.
For example, you have a £200 excess, and you get hit by a car (or whatever), you will have to pay the first £200 of the damage before the insurance company will pay the rest. If the total cost of the damage you incurr does not amount to your excess (ie under £200) they will not pay at all. Of course, the lower your excess the better, but.. the higher your excess, the cheaper your premium.
there are certain situations where it wont count. My excess was waived last year when the 3rd party (the other person in the accident) admitted responsibility to my insurance company (never do that! ever!)
Living as a student in liverpool yes, your policy will be loaded. I work for an insurance company motorcycle department, so i can confirm this

Of course, this rule is not the same for all insurers. Some brokers specialise in High Risk (ie.. you) policies. Adrian Flux may be a good bet. Devitts also.
Keep in mind that Confused wil not always give you the cheapest price. the way internet aggrigators work (people like confused) is that they only quote you BASIC policies. They then load you up on "compulsory" extra's when you phone up. i can confirm that also

It just goes to show that whilst Confused might be useful, you can't beat ringing round and getting prices yourself.