Every country which has (or used to have) a monarchy will find that that venerable institution usually comes attached with a string of specialist shops and merchants offering goods and services of all kinds to members of the monarchy. For instance, in Vienna, the capital of the former Austro-Hungarian Empire, you will see countless tourists from Asia and the US waiting patiently at the counter of Demel's Confectionary shop to spend their hard-earned money on some pieces of ridiculously expensive chocolates and cakes, simply because Demel's were the appointed Imperial Confectionary. Same crowded phenomenon applies to shops and merchants all over the UK who have the honour to provide members of the British Monarchy with clothing, tea, candies, footwear... etc. As a matter of fact, these shops and merchants have attained such degree of global prominence and popularity that you can find their goods and services virtually everywhere you go.
Which is why it is a bit unusual to see neither long queues nor anxious tourists crowding inside the very same shop where Haci Bekir, the inventor of Turkish Delights and Imperial Confectioner to the Ottoman Courts, first concocted the sweet meat some 232 years ago.