Aerouk - thank you. Unfortunately. O2, I believe, are part of BT, an organisation of quite stupefyingly ingrained incompetence and uninterest in customer service - almost as bad as TalkTalk!!
Capot - thank you also. For a moment it looked as though you had struck gold for me!
Unfortunately there is something rather odd about their site - each time that I try to check availability it comes up with 'unable to contact server' (or somesuch) Some of their preamble refers to Local Loop Unbundling as a prerequisite, which, presumably is what is being checked on their (unobtainable) availability site.Will try again later but am not hopeful
"Belay my last pipe"!!
Have just resorted to the 'Talking Bone' - now there's a novelty
and spoke to one of their people. Helpful and informative (but they all are , at that stage
) He will post me relevant package details so I shall see if it makes sense and proceed accordingly.