Journeys to and from place of work are deductable up to 3 months and the place becomes your pernament place of work. If you move base every 3 months you could claim for travelling. ANR headsets can be claimed if your company doesn't supply them. Accom for reccurrents is deductable although you must have reciepts for everything. You also claim percentage of your rent/mortgage and bills if you use your house as an office. Apart from expect to pay at least 30% tax!
As for TR's being deductable, good luck!