J Hapiak - 075 9060 6297 - was Wood Green based - sorted out emergency issues with my bathroom about 5 years ago including replacing broken stopcocks and dealing with my shower leaking through into my downstairs neighbour's flat (involving) getting access upwards through the downstairs ceiling and then replastering etc (neighbour was happy with the work and leak was resolved).
Also replaced a friend's whole bathroom in south london a few years later.
His prices were unbelievably reasonable and all the work was good.
He is Polish and doesn't speak much English but is happy to google translate explanations for things.
However I'm not 100 percent sure if he is still around what with Brexit and covid. Best way to check would be to send a text (unless you speak Polish).