Ink & Impression: Contemporary British Printmaking

Some of the best exhibitions in London are the free ones nobody's queuing for. This survey of contemporary British printmaking is exactly that: a couple of calm rooms of lino, screen and etching from makers working right now, hung with care and open to anyone who wanders in.

It's a perfect rainy-afternoon rescue or a slow start to a day by the river — twenty unhurried minutes that leave you wanting to make something yourself. Runs all summer, so there's no rush, but the light's best mid-morning.