#BritishSexPositions trends on Twitter as Brits employ classic humour ahead of Valentine's Day

Lines included: 'The Iron Lady: good for whoever's on top, but the bottom gets painfully screwed'

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British social media users have responded to the imminent arrival of Valentine's Day with customary sarcasm as the hashtag #BritishSexPositions trended across the UK.

Twitter was flooded with a number of witty interpretations of the popular hashtag.

We round up some of our favourites.