You are usually allowed to do so in main streets/public squares but priveate places like shopping malls and even some Council owned parks have special rules against this.

Get someone with a reasonable quality video camera to film it (preferably a pretty girl who attends college/uni, is studying a liberal arts course such as film or media studies and has no previous Police record but isn’t a full on yoghurt weaver activst type). As you seem to be a bit of a ladies man I am sure this won’t be a problem for you 😉 – I’m sure there’s a college round your way what specialises in these courses.

if anyone does dob you in get the girl to say she is making a comedy sketch for her college project. You will either be left alone or just told to do it elsewhere.