BUMPING into Diane Butler, who is soon to relocate to Malta with husband Alf, she launched excitedly into a travelogue about the delights of their new Mediterranean home. 'Do you know something?' she enthused, 'I will be just an hour-and-a-half from Rome.' Now there's a problem that Diane may not have envisaged. For what excuse will she now have for not being able to join the Pope for Mass every Sunday?