I agree, I didn’t expect anything. However there is an article in the Sunday Times travel section which says that an airline is obligated to return the tax element and charges because if you do not travel how can these charges apply. I don’t know if its legally binding. When I get home I will dig it out as I kept the article

Yes you can reclaim tax I have several times done so with Flybe now. They are obliged to take administration costs out of this. I have been left with under £1 from £20 tax normally with flybe which at least is something i guess!