HMRC has decided that if a contractor is subject to supervision, direction or control, they are not eligible to claim tax relief on travel and subsistence expenses.
Supervision – when you are being overlooked at your place of work to make sure you are carrying out your tasks in accordance to your contract. If you are receiving assistance, advice or help from anyone in your place of work, this can also count as supervision.
Direction – when you are being given clear instructions, guidance or assistance on how to carry out your tasks.
Control – when you are directly being dictated to in the workplace and you must do as asked in order to correctly carry out your assignment. If you are asked to move from location to location (whether inside an office or externally), you are under control.
To find out more, please visit the HMRC website for their official definitions.