I phoned up a few local garages asking if they did "four wheel laser alignment", they all said yes, so I digged a bit deeper...
"What do you charge?"
"£30".
Instantly alarm bells were ringing...
"How long does it take?"
"On average, an hour and a half"
"Does that include a before and after print out?"
"No, what do you want one of them for?"
"Do see what the tolerances are and how badly they were out"
"Oh that laser alignment, its a con"
"So how do you do it?"
"We straighten the front wheels, then make sure they line up with the back".
"Oh right, cheers for your time, bye"
I phoned 5 garages, all had similar response. Some bloke actually suggested I was from a rival garage and trying to get information, LOLLOL.