Thanks for the replies chaps.
JV, Yes but unless I missed something, I couldn't see anything relevent to the problem.
TS, been there and decided that it would be a last resort solution. Mrs B doesn't want too much "messing about" as she puts it.
Frostbite, brilliant bit of sideways thinking - it never occurred to me. Could be the answer. Certainly the easiest.
Thing is, I think it is very naughty of Tiscali to do that without apparently giving the customer any option. Ho hum. I'll see if Mrs B can be persuaded to use a different browser.