SIR – I do wish all those who write to the paper are cognisant with all the facts about the subject.

So, Mr Walgrove – Mrs Thatcher was Secretary of State for Education from 1970 until 1974, not in the 1980s, as was stated in your letter.

The “snatching” of free milk for school children from seven to 11 was part of a package of massive expenditure cuts levied on state education provision.

She was prepared to state, later in her autobiography, that she had pondered leaving politics as “I learned a valuable lesson. I had incurred the maximum of political odium for the minimum of political benefit.”

My other concern is to read of a playground full of bottles of milk, going off in the sun, presumably in the 1980s, referred to in the letter. How this could be, when the milk provision ended prior to the end of 1974?

If one is going to criticise others for factual errors, it is a good idea to get your own facts correct in the first place.

Geoffrey Green, Naseby Rise, Queensbury