Right, I did what you said and it seems to have done the trick (fingers crossed)
At least it seems to have got rid of the vast amount of ''.english' language file' & 'TPSubs.php' errors.
At first I couldn't manually transfer the TP files folder as the owner was Apache so I simply renamed it and then copied the whole folder and its contents.
I'm left with one error though which is cropping up now.....
8: Undefined index: tp-showlatest
File: /var/www/vhosts/dadsfme.co.uk/httpdocs/Themes/default/TPShout.template.php (tp_below sub template - eval?)
....I take it that's the line which would normally say "show next 50", but if so I can live with that - unless you know a fix for that too lol
Cheers for the advice though, I really appreciate it.