Walkers made tracks to help those forced into slavery, by trekking the route of the Piccadilly line from Heathrow to central London.
More than 100 people covered 653 miles between them over the course of three days, arriving en masse at Piccadilly Circus yesterday (Sunday, October 5) afternoon.
Members of Act for Justice in Hounslow - the local branch of Hope for Justice, which rescues human trafficking victims and helps them rebuild their lives - have already raised more than £9,500 for the charity and hope the top the £10,000 mark.
As well as generating funds for the charity, they were marching to raise awareness of the plight of modern day slaves, from those forced into prostitution to domestic servants.
Anita Potter was inspired to organise the walk after hearing how police had rescued a woman allegedly forced into prostitution at a home in Bath Road, Hounslow West, within a few hundred yards of Ms Potter's local church, St Paul's.
Walk the Line Hounslow was part of Hope for Justice's Zoe Challenge, for which supporters have been asked to trek 12,416 miles between them - the distance from the north to the south pole.
* You can still donate to Walk the Line Hounslow here or by texting WTLH61 followed by the amount you wish to give (the suggested donation is £2) to 70070.
