Thanks for that @mcilwraith enquires, why mention giffgaff? Perhaps he mentioned the cheapest options he could find.
As far as I am concerned, it is not always the cost involved in using a mobile phone whether at giffgaff or anywhere else, for me the real bind is the thought of being tied in for two years or so. I prerfer the freedoms and the options we have here with no tie ins.
That for me, is the beauty of Giffgaff, monthly goodybags, which can be changed whenever you wish and NO TIE IN.
Regarding the phone, rather than take what is on offer with a contract, i have chosen to pick the phone I want and not what a contract would give me.