My understanding on reading the guidelines is that we as transport workers are exempt from the 20 days maximum working in the UK. I thought this meant that we can work more than 20 days in the UK without being due to pay tax. Am I reading this wrongly and we cannot even work less than 20 days in the UK without being due tax? I also thought I read somewhere in the guidelines that a working day in the UK involves working more than three or four hours in the UK before it is actually classed as a working day which should cover our arses. Think as ever you will find no definite answers from the taxman with the usual case by case assesment as they see fit. Another concern I have is that if they do find an individual liable for UK tax then is the tax due on income or will they class housing and school fees as taxable income too?