In addition to what parabellum has already suggested , and speaking generally. If you paid for a type rating to put you in a position to do the job then the revenue would not consider the cost as being allowable for relief. The contractual difficulty you may also face is that you paid for a type rating and they supplied it in fullfilment of that part of the contract. Having obtained that type rating was there any contractual guarantee that they would then reimburse you other than for the period that either side elected to maintain a contract of employment? It is quite unlikely, since they would have almost certainly left themselves scope to terminate the contract within statutory terms and without additional penalty?