Adrian wrote:

Your original claim was that a lower proportion of those using taxis would
be likely to be affected than the population at general.

We are not talking about proportions of taxi users, but I think that's just
your bad English. What I said was:

'People who take taxis are less likely to be those affected by living near
heavy traffic.'

The socioeconomic data - eg from that stroke paper - clearly shows this to be
the case, unless you can prove that taxi passengers in London are just as
likely to be from the deprived groups affected more by proximity to major
roads.

E.