Well my trusty chair died last night, great shame as it was so comfortable.
Off to Viking direct I went, who I have used in the past for chairs and computer equipment.
After a good browse, ordered this :
Generously proportioned seat and back with posture-supporting curves
* EXECUTIVE CONTOURS. Get that boardroom look and feel for a great shop floor price. This fine leather-fronted chair with durable vinyl sides and back has generous contours, deep padding and contrasting piping. Tasteful looks which fit a home or office environment.
* STURDY COMFORT. Resilient chrome-finish base is nicely complemented by the exposed chrome-edging on the armrests. Leather-look vinyl on the sides and back provides great tear and scuff resistance, keeping the chair looking as great as it feels.
* Self assembly. Fire retardant level 0, 1 and 5
* Dimensions: Back height: 680mm Back width: 510mm Seat depth: 510mm Seat width: 610mm Seat height adjustment: 435-530 mm.
