Thanks for the replies, especially Steve for taking the time to post the pictures. Unfortunately I dont really have a choice about doing the job as I cant really afford to pay someone to do it at the minute.
Its strange how it happened, I havent had any problems with the starter up to now. Last week I drove 350 up to Scotland ( perfect car for the journey!), the next morning I tried to start the car and it sounded like the starter was stuck on so I switched the car off. I left the car until I was due to travel home then called the AA.
The bloke used his booster pack and the car started although sounded very laboured. He checked the battery and it was charging fine but the starter was drawing alot of current when cranking. It wasnt stuck this time so he followed me to the garage to fill up allowing me to do the journey in one go. Unfortunately it wouldnt start after filling up so he tried the booster pack, the starter was again very slow. He tried to add a further battery to give it more juice which resulted in smoke billowing from under the intake manifold, so I can presume there may be damage to the starter cables too. Anyway it took 12 hrs to get home changing AA lorries 3 times which was a bit of a pain, although the driver said it would have cost nearly £700 if I hadnt had cover- money well spent.
Steve, Did you have to remove the water bridge above the starter to gain access to the bolts? Also which gaskets did you replace and did you need any special tools from the normal to complete the job? Thanks again for your comments, just gotta get myself psyched up for starting the job on Saturday...