I was unfortunate enough to shell out £15 from Argos for a similar wall bracket the other week. Though this was a great deal amongst the price of other wall brackets i have seen.
Techlink TLCD4 - Wall Bracket For LCD TV Up To 23" or 20kg - Ultra Slim Profile Of 16mm - Silver
* Thin Wall Profile
* Fits most 15 - 24" LCD Screens
* Supports up to 20KG
* Includes all screw fittings
* Step by Step instructions included
Although it might be worth checking the TV you re going to mount has the relevant holes to secure it onto the bracket.
Hope this helps someone out.
To all those cold voters i keep getting, please let me know your reasons for voting cold, thanks.