CABE stalwarts Sir Stuart Lipton and Ian Ritchie got airtime on Radio 4's Today programme - twice. They were criticising the substitution of architects and the subsequent dumbing down of their designs once planning permission has been given. Apparently reader interest was noticeable after the Lipton interview, and Ritchie was brought in a couple of days later to elaborate - not least in respect of his doomed Crystal Palace scheme, where the substitution of his design has been little short of disgraceful. I gather the commission and its lawyers have been working on model clauses which local authorities could use, in conjunction with planning permissions, to make this sort of thing more difficult. Power to their elbow.