* An article on April 17 stated that Advent International sold Bulgaria Telecommunication Company to AIG last year. In fact, Novator exercised a call option to buy Advent's 65 per cent stake in BTC, which it then sold to AIG. * Persimmon will hold its AGM and release its interim management statement on April 24, but will not be publishing half-year results as wrongly stated in the FT corporate diary on April 21.