I’ve had and enjoyed the burgers at Meat Liquor, Mission, and Market. I’ve been to Honest Burger, Lucky Chip, Hawksmoor and Burger & Lobster and had great burgers.
For me Dip and Flip beats them all. I’ve been twice now, both times having the Dip and Flip burger, a cheeseburger with roast beef on top, served with a thin gravy to dip the burger into. The patty is cooked medium rare, is chunky, seasoned well and cooked on a flat grill so it’s very juicy. The bun is brioche, slightly sweet and holds together well for a very messy burger.
If this place was in a foodie enclave like Hackney, Soho, Brixton or Peckham it would have a line out the door, however because it’s in white bread and boring Clapham it’s an undiscovered and not too busy gem.