A super slimmer who lost 8 st in under three years is fulfilling a lifelong dream to run the London Marathon.

Rachel Biddulph, from Sutton, has dropped from 17st 7lbs to 9st 8lbs since 2007, and is now putting her newfound fitness to the test by taking part in her first ever marathon on April 17.

The 27-year-old said taking part in the 26 mile race was unbelievable, considering previously she never exercised at all.

She said: "Just walking would get me out of breath, so it’s amazing to think that I’m only days away from running a marathon.”

She put her weightloss down to joining slimming group, Slimmers World, and she now runs a branch of the organisation in North Cheam.

She is running to raise money for NSPCC. To sponsor her visit justgiving.com/RachelBiddulph