My email to Fortnum and Mason

I love living in London and one of my annual delights is to go around the West End looking at the seasonal lights and decorations.
As usual Fortnum and Mason trumped everyone else with your stunning window displays. So on Thursday 8th December I decided the icing on the cake of a lovely afternoon had to be afternoon tea at Fortnum and Mason.
Afternoon tea was 18 pounds but this is once a year and Fortnum and Mason.
The menu also states there is a discretionary service charge. I have followed, over the years, discussions on Radio 4 about such discretionary charges and just how discretionary they are. I was interested to see how Fortnum and Mason dealt with this. I told my waiter I did not want to pay the charge. He looked puzzled and took my 20 pound note. After some time no change appeared and I asked what was happening. I got given a second copy of my bill and still no change. When it finally came it was a collection of small coins (was that really necessary) and was scattered over my table some falling to the floor. The waiter did apologise but his general surly demeanor giving me my change said a lot more than his apology.
Ironically my change was 2.25. What did I do with this change? I put it in a Shelter collection bucket.
And the icing on the cake? The undercooked  iced cup cake.