An 8kg Zed, how welcome would that be!!!
It would appear that the old Zeds do a bit better in the warmer countries alright, whilst looking for information on catfishing holidays I happened across a photo of an Ebro 20lber which was being used to promote a restaurant! Some guy advertised Ebro Zandering trips in the back of the 'Snapper' (ZAC mag) about 2 yrs ago, unfortunately I was the only geezer to enquire so he went back to Catfish trips.
With regards to a UK 20lb Zed, there is definitely a bit less interest in Zandering these days and hence not so much water is being covered. The Gt Ouse is the place I'd put my money on, its done stacks of big Zeds over the last couple of years and is stacked out with prey fish. Its also a massive venue with plenty of water for a big fish to lose itself within. There are miles of it Im sure never see an angler!
I keep plugging away on Ten Mile Blank, its hard but perhaps one day..........
<retires to couch, dribbling about an 8kg Zed!>