Lillie Clack, 22, from Morden, was injured in the crash on Beeches Avenue on Christmas Day 2021 and died three days later.
The driver, Charlie Hilton, was jailed in 2023 for causing Lillie’s death by dangerous driving and driving above the alcohol limit.
Debbie Clack is urging lifetime driving bans and tougher penalties for motorists involved in fatal crashes while under the influence.
