Of course they'd be able to use a family computer of some sort, and I'd let them have some games consoles from an early age. Mobile phone I would probably let them have a basic one around age 11, so they can contact parents and it would start to give them some independence. Smartphones can come later (maybe GCSE sort of age?).
I would allow them to use things like a family computer or their games consoles but I would not let them be on there for hours at a time. I want them to have an actual childhood, outside playing with friends and particularly spending time in the countryside.
The key is moderation, but I absolutely don't agree with the idea that kids shouldn't be allowed technology at all. I wouldn't want to be that level of restrictive because that would be pointless and let's be honest reactionary.