Reconsider removing tax allowances from ex-pats

There are hundreds of thousands of British Ex-pats around the world that have worked all of their lives in the UK and then retired abroad. They have paid their taxes in the UK for all of their working lives, many still paying today and should not now be penalised if they choose to emigrate. I also believe that it is 'uneuropean' in as much as it impedes the freedom of movement within member states by the population of the UK by effectively taxing them to leave.
This policy punishes mainly those ex-pats that have served their country in the armed forces, police, NHS, fire brigade and civil service and shows that the UK government has no loyalty to it's most deserving of citizens.