Apple may have to change how it treats publishers in order to keep the iBookstore legal in the United Kingdom, a report claims. In the US Apple relies on an agency model, but lawyers and industry sources are said to warn that it could be violating competition laws. "If [Apple] are imposing their own terms and conditions, their own retail prices, effectively you have collusion among publishers because they are all being signed up on the same terms," notes lawyer Serena Hedley-Dent. "Publishers need to make sure if they are signing an agency agreement they are in con