Fun program.
Echo most of the comments here. Incredibly frustrating when they make stupid phonecalls etc that they know could see them caught. Emily was the worst for it, got set up with a sweet deal in a strangers' house, pretty much no way of finding her and then she makes a call and has to flee. She then tells strangers where she has to end up which enables them to pinpoint Surrey (though I suspect that this may have been contrived for TV, wouldn't have been much of a cliff-hanger ending if they'd not been able to pinpoint the airport as they did, although how long did it take to get those manifests?)
If they'd have been caught and I'd have been one of the two blokes or her mate, I'd have been really f*cked off with her.
Having seen the program it's easier to spot some of the simple traps you can fall into. Best way of organising an escape is to leave no trail - discuss everything in person rather than by text, phone or email, and if possible get a mate to do the research for you (ideally on a work computer so harder to trace).
Torn between the "wilderness" approach, which seems the most logical, and the "hiding in plain sight" approach which one couple tried as a necessity.
Once you're off the grid it's very hard for them to find you and they're usually left resorting to a poster campaign. Try and stay disguised when you go to new places and fewer people will recognise you. Head to the Highlands, the Lake District, Wales or the South-West and keep moving every couple of days. Hitchiking in this program is far easier than it would be in real life as drivers are more likely to trust people with a camera crew.
I do just like the idea of staying in mates' houses though. Not best mates, as that would be too obvious, but ask a few friends or colleagues if you can crash at theirs for a few days each, explain that they shouldn't contact anyone about you being there. Make some hand-made maps so you can get from A to B to C and just walk from one to the other.
CCTV doesn't have facial recognition - they can only use it when they know, roughly, where you are. At the start they're usually not picked up until an ATM transaction or they get in a car and drive past a camera with NPR. I'd just walk quickly to house A, stay in the spare room, and move on every 3 days, always walking and relying on mates to look after me. The ones who tried that only got caught because of an attempt to communicate.