A pair of siblings are running the London Marathon in memory of their father who died while volunteering for the RNLI. Luke Titcomb and his sister Lucy May will be taking part in Sunday’s 26.2 mile race across the capital and fundraising for the lifeboat association that their father was so proud to be a part of. Their father Mark Titcomb, who was from Newbury, retired in 2019 and moved to Port Isaac in Cornwall where he fulfilled his lifelong dream of volunteering for the RNLI. Mrs May said: “Luke and I are running the London Marathon in memory of our truly amazing, one in a million dad who w…