Totally agree

does that actually matter,

by which time we will have wiped out the wood land so they will die out anyway, what is so special about red squires that make them better than greys?
what about the change of woodland, i watched a program that reds cant cope as well in modern forests, greys can, this problem on every level is because of man

So basically we should do nothing - all all the trees and native birds that are declining as a direct result of this introduced non native animal should just be let die out?

Yes reds do less well on some types of woodland - which means they are less dense in those woodlands and have less of an impact - not destroying trees and fragile tubers and bulbs
out compeating birds for nesting sites and feeding of their eggs and young
raiding some birds winter store of nuts and seeds

Its not just the red squrels who suffer - our woodlands have adapted a careful balance between out native flora and fauna
Greys are putting this out of balance

and to say we should do nothing cos we are going to wipe out all the woodlands in the UK anyways! -

This is a mess man has made - and a mess man should fix

Well considering thats what Luthian asked, the differences bewteen the two species, yes of course it does!

You know this how?
The Red Squirrel is our native species, the Grey isnt. Its an imported pest. It destroys woodland (which you seem to care about) and is driving our native red to the brink of extinction. Something which it has already achieved in some parts.

Then we should do everything possible to ensure their number rise to give them the best shot at "evolving" and coping with the situation you claim is happening. Im somewhat intrigued to know what a "modern" forest is though, especially when neither the red nor the grey squirrel need them to live in specifically.

How do grey squirrels destroy woodland?

A short excerpt:

I read somewhere that they are more responsible for tree damage than Deer! I cannot lay my hands on that at the moment though. It also showed images of squirrel damage in a young woodland. Should I find it again I will post the link.

Re Squirrel Pox virus:

My biggest question is, will humans learn from things like this to stop interfering with everything?... I doubt it!