paynes wrote:as long as these costs are "wholly and exclusiviely" in respect of my work I am able to claim tax deduction
Correct, although the key point is whether or not you understand what wholly and exclusively means.
paynes wrote:Are there any time limits or restrictions I should be aware of?
BIM37620 of HMRC's Business Income Manual would be worth a read.
Interestingly (given where you live and work) in Horton v Young the judge sought to put limits on what is allowable and gave the example of a person living in London but working in Cornwall as an example of where the distance would be too far.