Thanks for your help, this is what I did:
Bought folding crane off Machine mart with a vat-free voucher, for that price, it's a no-brainer.
Got the engine out, it's not difficult with the right tools, most of which I already had. It's technically possible to do a clutch, belts and mounts without removing the engine, but you'll end up not doing it right, getting filthy, skinning all your knuckles and with a screaming back ache for no saved time and not a lot of saved money. Just get the bugger out, it's much simpler!
I cleaned the engine, no one needs that amount of gritty grease covering everything, and it allowed me to de-clog the rad. I used truck-wash in a spray bottle and a pressure washer.
The clutch removal needs either a really expensive tool, or a really cheap one and a bit of sense. I already owned the cheapy (search ebay for "2MT drift") and noted that the last time the clutch was removed, it was done cheaply, but without the sense bit.
I cleaned up the damaged clutch taper while swearing about amateurs.
I checked all the important parts for wear and ordered replacements with Osbournes. They were not the cheapest by about 9%, but the quality of aftersales and extremely knowledgeable telephone support easily made it worth the extra few quid. Ask for Michael, he is incredibly helpful and I could not have done this without him. I'll buy all my future parts off them.
I replaced the fuel lines with clear reinforced poly pipe so I could see when there's air or gunk in there, Osbournes also supplied an inline transparent fuel filter. These aren't hi-pressure injection engines, so you don't need crimped connectors and hi-pressure tubing.
Parts will arrive tomorrow and i'll fit at the weekend, and maybe put the engine back in then. Assuming that the hydraulics are all ok, we'll be greasing those nipples and a go for testing next week.
From the quote I was given to replace ONLY the clutch, I reckon i've saved about £400 after tool purchases. I also found a bunch of extra stuff that needed doing that the guy hadn't noticed.
To the next chap that wants to save himself the cost and DIY, PM me if you want any advice
Cheers
JDS