In London, stop Heath's scandal? (8)

I believe the answer is:

moorgate

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'in london stop' is the definition.
I know nothing about this answer so I cannot judge whether it can be defined by this definition.

'heath's scandal?' is the wordplay.
'heath' becomes 'moor' (I've seen this before).
'scandal?' becomes 'gate' (as in Watergate and other formations).
'moor'+'gate'='MOORGATE'

Can you help me to learn more?

(Other definitions for moorgate that I've seen before include "area of London" , "London station near Barbican, a metro go (anag.)" .)

I've seen this clue in The Guardian.

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