EIM32075 | Travel expenses: travel for necessary attendance: definitions: temporary workplace
From HM Revenue & Customs · Employment Income Manual
Section 339(3) ITEPA 2003
A workplace is a temporary workplace if an employee goes there only to perform a task of limited duration or for a temporary purpose. So even where an employee attends a workplace regularly, it will be a temporary workplace and so not a permanent workplace, if the employee attends for the purpose of performing a task of limited duration or other temporary purpose.
Limited duration is explained at EIM32080.
Temporary purpose is explained at EIM32150.
If a workplace is capable of being a temporary workplace by reference to this rule, you must consider the following additional rules:
the 24 month rule, see EIM32080
the fixed term appointment rule, see EIM32125
the depots and bases rule, see EIM32160
the area rule, see EIM32190
These rules can only apply if the workplace is capable of being a temporary workplace by reference to S339(3).