No.
But, like others I'd suggest looking into buying it and renting in London for a few years, then moving.
You can always rent out the Devon house while you do that, to help with income.
That said, by the time it comes to move to Devon, I suspect London may be a more attractive option than Devon - so if you then decide you don't want to move, you might not be able to afford to stay in London.
The impact of Brexit kicks in after coronavirus (🤦♀️) and that suggests the economic cost is going to be lower in London than elsewhere in the U.K. That may have a significant impact on what a move to Devon entails.
But ... all that may be irrelevant if living in London was only a temporary thing for you.
Still, if you want this, a good compromise is to sell up, buy the Devon house, rent in London for a few years.
The education issue matters. You'll almost certainly find it a nightmare finding school places, they're likely to involve travel, and your 14 year old is unlikely (very) to find a school with the same GCSE offer she is now following - and extremely unlikely to find a school that has covered the same parts of the syllabus - especially because this year has been disrupted.
This past year has been awful for young people. She will be struggling with the impact of that already. Whacking her with an extra load of dealing with a whole load of education and social change is an enormous ask.
For a start, how will she actually make new friends with the tier system and possible school closures still a possibility over 2021?
And how will you, for that matter?
It's a huge thing to expect of a teen. She'll need a lot of your support and understanding. Do you, as a family, have the bandwidth to acknowledge and support it?
I wouldn't. 🤷♀️ I'm finding it hard enough to support my teen as it is, without factoring a bloody huge life change.
Anyway, good luck with whatever you decide.