I noticed that the obituary of Andrew Gosling (11 July) said he was the one of the first to use the blue screen colour-separation for a TV production. This technology had already been used in the 1972 BBC production of Candide, directed by James MacTaggart and designed by Eileen Diss. Eileen’s drawings for the backgrounds, in the style of 18th-century engravings, were exquisite. The downside was that the costumes, designed by Elizabeth Waller, had to be completely devoid of blue.
Vanessa Hopkins
London
• I think the teachers in my 1950s British state primary school would have been surprised to learn that they were teaching “Asian-style” maths that would be raved about in 2016 as revolutionary and groundbreaking (Report, 12 July, theguardian.com).
Elaine Luke
Fairlight, East Sussex
• It’s meaningless to state that “a dwarf planet half the size of Britain has been found” (Tiny planet found near edge of solar system, 12 July). The international unit for such things is the Wales.
Fr Julian Dunn
Great Haseley, Oxfordshire
• So Polly Toynbee believes Angela Eagle is “a spark of hope” (Opinion, 12 July). This is an MP who voted for the Iraq war, is pro-austerity and pro-tuition fees. Hardly someone to chart a new course for Labour and win the respect of Labour members and voters.
Derek Cattell
Durham
• Katharine Viner’s article was spot-on and well argued (How technology disrupted the truth, 12 July). The only omission was that it failed to mention that beacon of investigative journalism, Private Eye. Keep up the good work.
Mike Welton
Frome, Somerset
• “Who will dare pull the trigger on article 50?”, asked your article on 27 June. Theresa May – but will she?
Susan Tomes
Edinburgh
• Join the debate – email guardian.letters@theguardian.com
