Its sad to hear the market is adversely affecting our lovely local shops.
We still go to The Butchery and Agas, however we haven't found anywhere in our immediate vicinity that sells such a good selection of Veg as the farmers market, and likewise the nearest decent fishmongers are on Lordship Lane and Sydenham.
My feeling is that the Farmers market attracts more choice to shop locally rather than resorting to Borough Market or the various shops on Lordship Lane-Which is what we did before it opened(I'm a devotee of juicing and raw food and organic produce)
To my mind the thing to do would be to set up a 'Totally Locally' stand at the market, with flyers and perhaps tasters of what is available In the likes of Sugar Mountain,Aga's etc,
Or I would station people at the entrance handing out flyers inviting them to explore further, perhaps suggesting they could also browse the art at the Montage, Vintage at Dapper and Stag and Bow (and the Montage).
Stop for coffee and cake in one of our excellent coffee shops, or a pint at Sylvan post.