Nights spent on domestic business trips in England 2017, per month

* Interviewing is carried out every week of the year using a face-to-face methodology. Annually, some 100,000 respondents are contacted, and any who have returned from an overnight trip within the past four weeks are asked to describe the details of that trip.

The source adds that the results are provisional and subject to minor changes in subsequent months due to the inclusion of trip-takers returning from late trips.