On 12 May 1969, between the recording and release of their next album "Unhalfbricking", Fairport's van crashed on the M1 motorway on the way home from a gig at Mothers, a club in Birmingham. Drummer Martin Lamble, aged 19, and Thompson's girlfriend Jeannie Franklyn were killed. The rest of the band suffered injuries of varying severity. Later in 1969, Fairport re-grouped with a new drummer, Dave Mattacks, and also invited the well known fiddle player, Dave Swarbrick, to join. Thompson and Swarbrick worked together to create songs such as "Crazy Man Michael" from the band's seminal 1969 folk-rock album "Liege & Lief" and "Sloth" from its 1970 follow-up "Full House".