Heli and Whirl, cheers to the both of you, your advice is invaluable to me. I truly respect experienced people like you who take the trouble to help plonkers like me. As we speak, the police helicopter is hovering over my South London home (again) and I'm imagining myself in it (flying, that is, not being nicked). One day, maybe. I'm thinking of opening a cats home as there seems to be loads of rich old spinsters who leave loads of cash to cats homes in their wills.
Best wishes to the pair of you and thanks again
PS just remembered, I'm allergic to cats. Scuppered again