There has been a great deal of progress since the original breast guidance was published, so much so that it may seem to some that implementation of that guidance is largely achieved, that modern multidisciplinary breast cancer care is ‘a done deal’. But the challenges of rising numbers of new referrals, the need to respond within tight time-scales, and advances in diagnosis and treatment mean that teams must be very well organised and well supported to succeed. Despite obvious progress, breast teams do not all work optimally. Breast teams need good internal systems and reliable support to ensure that all members meet regularly and operate effectively together and.