I fully understand, in the interests of fair-play, you can't expect anyone living in Newcastle, let's say, travelling to the South-East year in year out.
The population in the SE is far higher than other parts of the country, and it isn't practical for me (and others, no doubt) to travel to Manchester.
A suggestion: couldn't WHFI S&V co-host a second exhibition in London with a sister mag, like What Car, for instance?