Well i`m ere in nuneaton and the site is deserted...Its a building site and i`ve just done my 1st patrol and alls very quiet... I hope it stays that way...

When I was a tiddler, building-site security men were known as "Cocky Watchmen"......and kept warm by toasting themselves near a brassiere each night! 
..... 
I remember similar events, witnessed as a child 8-) I recall these fires (fuelled by coke) being contained within large drum like devices bearing lots of ventilation holes. The heat output was quite impressive.
I also watched, fascinated, as the sentry prepared his regular cuppa by placing a mix of loose tea and sugar into a large can of water and suspending this over the inferno.
When the concoction reached the point of satisfaction to those eagerly waiting this strong liquid was dispensed into tin mugs, milk added and imbibed with relish.
I also remember the acrid odour given off by the coke as it burned and the little paraffin fuelled warning lanterns with the curled arms dotted around the work site as a warning to the unwary.
Of course, by the time dawn's early light graced the scene the magnificent fire was subdued and tamed by hours of neglect as the sentry was invariably found in a state of blissful somnolence by us children (who were early risers), propped at an odd angle within his temporary shelter.