Double glazing (doors & windows)

ashnojutsu

Please see the quote below, and give your opinion on whether this quote is reasonable:

All doors & windows are uPVC (& 1 composite door)

Supply & fit:
3 x windows,

2 x 7-part bay windows,
1 x double door (rear) + 2x side windows,
1 x Composite door (front) with side window

Details:
28mm double glazed units.
Low E Glass.
Toughened glass where required.
Multi point locking system.
White Internally glazed Upvc.
Push button white locking handles.
Fire escape hinges fitted if required.
A rated products.
Night vent facility on all opening windows.
New external cills fitted.
Fully reinforced bay poles & bay jack fitted.
High security hinges claws.
Mid range composite front door panel

Caveats:
All making good to be carried out internally & externally.
All rubbish to be cleared from site.
FENSA regulated
Ten vear insurance backed warrantv included.

Total:

£7800

I'm based in the London area. I'm getting some more quotes for comparison, but wanted some opinions on whether this was fair or not? Thanks!