[Sundae]

Thank you!
They Sky+ Dad's Army every week, have done or years, and Dad still laughs at the same things. But on your suggestion I looked around the internet and saw things like Dad's Army socks (he always needs socks) and a book I can get 2nd hand, so even if he never reads it won't cost more that £3 etc etc.

Exactly the sort of thing I wanted - meaningful, not immediately disposable (Mum would read the book) and/ or useful.
Knew you'd come through.

But all suggestions considered.