EIM32153 | Travel expenses: travel for necessary attendance: attendance for a temporary purpose: example
From HM Revenue & Customs · Employment Income Manual
An employee lives in Sidcup and has a permanent workplace in Broadstairs. He is a director of a company that has a number of regional offices. He has to attend a directors meeting on the last Friday of each month in Farnham. A deduction is due for the cost of travel between his home and Farnham.