Add data feed for England

[goofballLogic]

England

England's are a little different in that they use "parameterName": "string", for type of reading but only supply 2, Water level and Flow. Nothing else.

Originally posted by @JoeEarly in #6 (comment)

[goofballLogic]

@JoeEarly can you give me the link/whatever for the England data?

[JoeEarly]

Nice API https://environment.data.gov.uk/flood-monitoring/doc/reference