Chap here is having his blood pressure monitored for 24 hours. So he has to wear a piece of kit, comprising a small monitor type thing, with cables running to sensors on his arms etc.
So he is walking around in the centre of London, with a box thing on him, that can start beeping, connected to parts of his body by a series of cables... suppose on the plus side, no-one will zap him with a tazer...
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