Has some good reviews. As its galvanised it should last as well as the much dearer wooden ones. 2.2m high and suitable for 50kg per seat. EDIT Box just arrived states suitable for 3-8 years (although I wouldn't worry too much as long as you stick within the 50kg).

They also have a swing plus glider for £60 http://direct.asda.com/sportspower-titan-2-2m-galvanised-swing-and-glider/000786832,default,pd.html

Single swing for £38 at Very http://www.very.co.uk/sportspower-22m-high-galvanised-single-swing/1458206626.prd