One guy I know nothing about, but the other has made himself obnoxious in more than one church, refusing to accept discipline or advice from the Pastor. There is a Street Preachers Association in Britain who would give these people training, advice and accreditation, but they are not interested. The one man's preaching style is aggressive and confrontational in the extreme, and in short, he is more likely to turn people away from Christianity than attract them.
Having said all that, I am relieved that they have been acquitted , because otherwise atheist and homosexual groups would have been trying to get all open Christian witness shut down.