Looks a good find mate your best bet is to keep location secret get a good metal detector and search around that area for more you might of found a little nest egg ATB mark
Some better ones on a clear day but to your question I would say yes it's a worry where I live in bishop Auckland you can feel and taste the fresh air 100% more than London your chest gets heavy berthing more faster it's a pure shitter but it's happening
I've been grafting down London for the last two weeks and believe me the shit was bad dust on the van was bad I was 140 ft In the air and could see fxxk all after about 30 mtrs just as well the mobile tower Crain was close but the shit had moved over night so had to travel home init
It's called,, find my I phone ,, it saved mine when I lost it out lamping one night go on a laptop or some one else iPhone / pad log into Your iCloud account select the FIND MY I PHONE app register and it will locate your phone in a instant
ATB mark
My misses rang this morning in tears to say two Jill's were missing ,the pen door was open, I don't know if they were stolen or she never lock them in properly so if any one finds or here's two found or for sale pm me asap thanks mark ps I'm putting a £50 safe return reward for them both