Lennon was born in Bellshill and raised in Blantyre, South Lanarkshire, the daughter of Gerald "Gerry" Ward, a council health and safety manager, and his wife Helen. She attended the co-educational, Roman CatholicJohn Ogilvie High School in Hamilton. Lennon studied environmental planning at the University of Strathclyde, graduating with a BA degree in 2001. While studying she lived with her father. Her parents had separated, and later divorced, as a result of her father's drinking which developed into severe alcoholism. From 2001 until 2007, Lennon worked as a planning officer for South Lanarkshire Council. She married at the age of 24 but felt forced to exclude her father from the wedding because of his alcoholism; he died 60 years old. After leaving South Lanarkshire Council, she worked as a surveyor for commercial property consultancy Knight Frank, also freelancing as a planning consultant, until her election in 2012.
Political career
In the 2012 South Lanarkshire Council election, Lennon was elected to represent Hamilton North and East. Then, in the 2016 Scottish Parliament election, she was second on Scottish Labour's Central Scotland regional list and was elected as a Member of the Scottish Parliament. Shortly after being elected, she was appointed by leader Kezia Dugdale as Shadow Minister for Inequalities, a role in which she campaigned to raise awareness about the need for women to check themselves for signs of breast cancer. In the 2017 Scottish Labour Party leadership election, Lennon nominated fellow Central Scotland MSP and left-wing ally Richard Leonard. In December 2017, Leonard announced his new Shadow Cabinet, in which she was promoted to Spokesperson for Communities and Local Government. In November 2017, Lennon went public with how she was sexually assaulted by a Labour colleague while other colleagues brushed off the incident at a party in 2013. Following revelations of similar incidents within the party, she argued that the party and British politics had an institutional problem with sexual assault and harassment. On 6 September 2018, Lennon made a speech in which she spoke of a constituent who had committed suicide shortly after Christmas 2017. The constituent pled with health services for help eight times in the six days directly before he died, but was either turned away or referred elsewhere. Lennon asked Nicola Sturgeon to take urgent action to review suicide prevention procedures in NHS Lanarkshire. In an October 2018 Shadow Cabinet reshuffle, Lennon was again promoted to Spokesperson for Health and Sport, replacing Richard Leonard's former leadership rival Anas Sarwar. She used the position to campaign for institutions to provide free menstrual hygiene products, to tackle period poverty. Along with Neil Findlay, Lennon abstained on an SNP government bill in favour of a second Scottish independence referendum. This was against their party's whip, which was to vote against the bill.
Personal life
Lennon is married with one daughter, Isabella. She is a feminist and a vegetarian, and suffers from ailurophobia, an irrational fear of cats.