How far from London is far enough?

Venues in the Home Counties are convenient and people treat them as an extension of the working week. Someone will pop back for a meeting. The event never fully starts.

Far enough that nobody is nipping back, close enough that a train journey is not a whole day and the travel budget stays sane. Mid-Devon sits almost exactly here on the Paddington line, which is the main reason we are viable at all.

You are now spending a day of the event on travel and materially more money. That is worth it for a week, rarely for two nights.

A team spread across Manchester, Bristol and Berlin has a different centre of gravity than a London office. Work out the total journey time across everyone before deciding what is convenient. For a single day in the city itself, our London space on Kingsland Road is the other half of the answer.