Dangerous Structures, Keep Out Sign and Fencing on River Thames

keep out dangerous signage danger of death razor wire warning seagulls no access red sign no public access industry fencing sign no entry barbed wire cordoned off disused wasteland rust private land structures destruction disrepair defunct birdlife crime wrack and ruin locked wear and tear derelict decrepit urban nature hazard urban ruins abandoned embankment typography thames riverside decay private river neglected river crossing jetty forgotten pier river walk