Due to the ever present gentrification of the surrounding areas, there are fewer greasy spoons than in the past, but this eatery has what you want
https://www.tripadvisor.co.uk/Restau...n_England.html If that's too posh, then head along Falcon Rd towards Clapham Junction (10mins stroll from the helipad) where there are a couple of cafes that will make you happy to run back to the river.