What are you planning to do? There are so many things to choose from. If you are in London, there are innumerable markets that you can visit. Some of them are:
Some of them are clothes markets. Food markets have been springing up in London. Portobello Road is a famous antique market and is so busy as tourists and locals flock there on Saturday.
Why not practise your speaking skills by asking for as many items in the pictures.
The sentences you will need to know are:
“May I have ….. please”
“How much is it please?”
If you do not know the name of the item that you see in the picture, you can check your hard copy of the dictionary or go online and check. Good luck. Happy Saturday.