Lots of people are due a Tax rebate for items of expenditure that they would never have thought possible. For most of these areas of cost, HMRC do not know your situation and therefore cannot apply a repayment automatically. It is up to the Tax payer to let HMRC know of any Tax reliefs they may entitled to.
The problem is that claims are reviewed on a case by case basis. As an example, for some individuals travelling expenses may be allowed, for others, these costs may not be allowed.
The only sure way to know is to get in touch. With a no-obligation enquiry taking 5 minutes of your time, you have nothing to lose but potentially thousands to gain.