OK so not g40 related but these might be useful for someone's daily driver!
(http://derby.polog40.co.uk/photos/forsale/federal_tyres_1.jpg)
(http://derby.polog40.co.uk/photos/forsale/federal_tyres_2.jpg)
All with between 3-5mm tread. Have been in my garage for about a year, was using them before that.
These are something like £250 new for four but I'm just after £70 for them as I need them gone.
Local pick up from North Manchester (near Bury) or can take them to work just outside Huddersfield.