PSV, Waterloo

The tradition of exciting, regional SE Asian food appearing above or behind unassuming pubs in London is alive and well. The first time I encountered such a thing was all the way back in 2011 at the Heron in Paddington , where you could demolish fiercely authentic laab ped and tom yum soup while downstairs oblivious locals sipped on pints of Stella and ate crisps. More recently, Khun Pakin Thai…