Been looking for a QHD monitor for some time and I was close to settling on the P2416D, Instead I punted for the U2515H.
Laptopsdirect are currently the cheapest price, and with the which offer (advertised on the page), it brings the price down £19 (When you minus the £1 sub).
Simply sign up to which pay the £1 (a voucher gets emailed to you immediately) and cancel the subscription.
2% Quidco to which just about negates the delivery charge.
All in with delivery £254.93