There are a number of people who are able to make a tax rebate claim when they leave UK You can certainly make a tax rebate claim even after you have left UK.
Do not let the perceived hassle of claiming tax back stop you from getting what is due to you. Taxrefund4you has already processed more than 10 000 successful claims.
You must be aware of the fact that the citizens of the country are required to pay tax to their government from the income earned by them in order to avail the benefits of services provided by it.