AOC Monitors
18.5", 16:9, 1366 x 768, D-sub, no speakers.
£99.95 inc vat

21.5", 16:9, 1920 x 1080, D-sub, LED, Speakers
£139.95 inc vat

23.6", 16:9, 1920 x 1080, D-sub/DVI, Speakers
£175.95 inc vat

27", 16:9, 1920 x 1080, D-sub/DVI, HDMI, Speakers
£234.95 inc vat

3 years swap-out warranty with AOC:
http://www.aoc-europe.com/en/service-support/warranty.html