Can I grow a grape vine/kiwi fruit plant in large pots,

a vine yes

Thanks Martin. I have my camo net up on the aforementioned wall now, as per
your recommendation (it's a huge improvement on the tatty peeling
whitewash), and I'm nearly ready to go. I'm going to put the grape vine and
kiwi fruit vine in separate, large pots, and hopefully that will do the
trick - they can grow up the camo net. I haven't actually got the vines yet,
but that's the next thing.

Andrew