sentences:  Clive Burgess and Ronan McDonald set a new Guinness world record time of 16 hours, 14 minutes and 10 seconds on 21 February 2015.The record was broken later that year, on 21 May, by previous record holders Andi James and Steve Wilson, in a time of 15 hours 45 minutes 38 seconds.Attempts to travel the network have been linked to charities such as Children in Need and Comic Relief.