And we are still suffering the fallout....
Apparently in 894, a force of Danes sailed up the River Lea to Hertford, and the following year they built a fortified camp in the higher reaches of the Lea, about 32 km north of London.
(Dirty) Old Man River
For the second time this week the patch makes BBC local news, though not sure either story puts us in a good light. Looking on the bright side, maybe the pollution will kill off the Shark/Crocodile/Alien Creature that lies below.