This producer is usually at these markets:

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High Street Kensington
Apples
From 20th September Every Sunday 10am-2pm
Phillimore Walk, High Street Kensington W8 7RX
Marylebone
Marylebone Farmers Market
Every Sunday 10am-2pm
Aybrook Street, Marylebone, London W1U 4DF
Queens Park
Queens Park farmers market
Every Sunday 10am-2pm From 17th July Fridays 6pm - 10pm
Salusbury Primary School, Salusbury Road, London NW6 6RG