Three U.K. companies have recently unloaded a combined £5.3 billion ($8.7 billion) in longevity risk from their pension funds, making 2013 a record-breaking year for such transactions.The deals bring the total volume of pension risk transactions, which include longevity swaps and bulk annuity arrangements, in the U.K. to a record £16 billion for the year. The previous record was £12 billion in 2011. Since 2008, the yearly average had been about £8 billion.