Well finally sorted out my insurance after about nearly 5 hours on the phone over the last two days (probably about 60% of it on hold), decided to reduce my annual mileage from 5k to 3k after looking at the mileages on my maintenance spreadsheet - last 9 years average 2296 miles.
Adrian Flux - £265 Agreed value. Excess £250 Windscreen Excess £100
ClassicLine - £268 Agreed value. Excess £150 Windscreen Excess £90
Chris Knott - £211 No Agreed value unfortunately Excess £300 Windscreen Excess £?
Hagerty (never tried them before now) - £509 Agreed value Excess £400 Windscreen Excess £?
Footman James. - £0 gave up after getting - "We will be with you shortly" + music for 15mins then line cut off!!!

Manning (been with them previously) didn't bother. My ear was getting sore from telephone calls.
So renewed with Adrian Flux for this year, little bit of hassle about agreed value paperwork (still got to resend AV forms in + photos)
However very close between AF and ClassicLine, pity Chris Knott couldn't come up with Agreed Value option. Be interesting see what happens next year.

Though it does show it's worth ringing round.