FREE HEALTH MOT: Feeling a bit fragile after all the festive indulgence? Start to put the damage right with a free blood test from Medichecks, who are testing Londoners' cholesterol and blood sugar levels today. You won't need to hang around long as they are providing the results instantly. Liverpool Street Station, free, just turn up, 9am-8pm
LUMIERE LONDON: Finally, Lumiere London is back to blast the January blues away with a wall of blinking lightbulbs pulsating to a soundtrack, a neon sign by Tracey Emin and plenty of illuminated, interactive sculptures — we'll be making a beeline for those luminescent seesaws. Here's what you need to know. Various locations, free, just turn up, 4.30pm-11pm, until 21 January
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