By Alan Smith This year’s London marathon will see 90 runners attempt to set 79 new Guinness World Records – from the Ipswich woman carrying a fridge for 26.2 miles to the usual mixture of elaborate fancy dress costumes. And the estimated 50,000 people who toe the start line in Greenwich are expected to again raise huge sums for charities across the UK after £63m was made last year to bring the overall total since the race’s beginning in 1981 to more than £1.2bn. GWR adjudicators will be on hand at the finish line to verify times and check costumes – so record-breakers can be confirmed as reco…