is Summer single bed rail is a staple item when transitioning a toddler from their cot to a bed. The rail offers great security, as the simple anchor mechanism ensures a snug and secure fit. Minimal assembly is required for this bed rail, and it will fit up to a queen sized mattress.
Link is to the blue one, pink is here: http://direct.tesco.com/q/R.206-8620.aspx
(Delivery charges extra unless you get delivered to store which is free)