Get a banner that is sized the same size as your windscreen, and another one the same size for the back of the van.
Get it in a bright colour eg. Yellow / Orange, and print on in:
"Who Else Wants to Earn Up to £15 an Hour?"
Then park the vans outside the busiest petrol stations in your area, at the weekend.
Only interview applicants with a CV.
About 30% of them will flake on the day of the interview, ditch them, and the ones that turn up on time are your candidates.
You need to 'sell' to them the idea of working for you and offer them something that they are not going to get elsewhere.
For some they will want to earn decent money, which you need to be able to offer if they are good.
For others they want short hours.
Some just want to work to work for decent company that looks after their people (Simon Sinek is great on this). I always told them my track record, that I'd employed twice before and one of my team was with me for over 4 years, and that the other member of my team had been with me for 14 months and was still on board.
They also get told that the front line team are the heroes of the company, and that management serves front line staff, and never the other way around.
People first, customers second. It sounds counter-intuitive, but you will never get great service unless your people are settled.
I gave potential members of the crew 3 options in terms of career progression.
Grafter: Work about 8 hours a day, and take home before taxes and national insurance about £105 per day.
Lifestyle: Be home by 2.30pm, and take home about (before tax / NI) about £70-90 per day.
Career: Work on the front line initially, and then, when you have proven yourself, start working with me as part of the senior team of the company.