You Brits like to travel abroad, so you must have noticed that, from Calais onward, you will find in gas stations both seat and Turkish loos. It's not that the latter are for muslims but rather that some prefer them so, for hygiene reasons.
Belgian joke : Why do the Belgians go to the toilet and the French go to the toiletS ? because in France you have to try several of them before finding a clean one.