It can be fiddley but it's really not that difficult. 
With all due respect Andy, that depends......
Mechanic mate came around this morning and spotted the problem almost straight away.
I'd bought some Pagid brake shoes from Euro Car parts (about £40 cheaper than VX ones). I'll try and explain this as best as I can, but please forgive me if it doesn't make much sense.
The centre plate that runs down the length of the brake shoe, (the one with all the holes in for locating springs, clips, pins, etc), was "off centre" by about 5mm. Not much, but enough to make getting the cap on the pin almost impossible. So, I'm not faced with two options. Either return the complete set of brake shoes, (both sides), to ECP, or get the Dremel out and cut a line (link?) out of the retaining spring. I chose the second option, and managed to get the cap located over the pin in about 5-6 attempts. Thank God for that!

I'm now faced with a second problem

Either the shoes have too much lining material on them, or, (as I suspect), the lining material isn't attatched to the metal base of the shoe in a uniform fashion, meaning that at certain points, even with the shoe tension wound all the way off, my drums aren't able to fit over the shoes. I've just spent the last hour or so sanding a little off at a time with the emery cloth. Nearly there, but have popped inside for a bit of dinner.
Please bear in mind that I have already done the shoes on one side, so I'm aware that the shoes require a little bit of jiggling to get them to line up with the drum, but these things are miles out. I've already checked and double checked to make sure that none of the other springs, pins, brackets or adjusters are out of kilter, and everything else seems to be spot on.
The ironic part about all of this faffing around is that the old handbrake shoes wern't actually that bad. I could proberly of sort out my none existent handbrake by fitting new discs and having a play with the adjustment 'star' inside the drum, (the adjuster by the exhaust centre section was wound all the way in.
So, the fun just never stops. Man, I'll be so pleased to have finally got this bugger done.
Fingers crossed that cam cover gaskets, cambelt & tensioners, auto-box oil & filter and changing all the other fluids and filters isn't as much of a pain in the backside as this job has turned out to be.