In message , at 14:00:30 on Thu, 3 Oct 2019,
tim... remarked:

And moving house to be near a job, especially one like Heathrow,
isn't a walk in the park.

If you already live in a different part of London it is.

Moving further than a sensible commute for the children to get to
their original school is difficult.

so they move school

thousands of children do it every year

it's not impossible

See my reply to David.

Hounslow is not a prime London property location

For a reason. And hence why would people want to move there?

Because if they are in London and can only afford "Hounslow" prices,
they will already be living in an undesirable area of London

Not true. Price reflects convenience as well as posh-ness.

But if you can afford more there are are desirable areas that are
commutable as well

By bus, remember (unless you are looking at only the Heathrow Connect/
Piccadilly Line corridor).

I am making the point that if you already live in London and you move,
you can make a like for like move at your price point and still be in a
area with the same amount of desirableness (or un-desirableness).

You don't have to find an extra 300K because the starting point is 300K
more than where you have come from

People relying on public transport are usually a bit below that price
bracket. Renting, probably (with mobility in public housing severely
restricted).
--
Roland Perry