@izzythepush,
Lavatory isn't even considered to be English here. It's seen as posh and show-offy and somewhat French. We say we're going to the can unless we're going to be washing our hands - in which case we're going to the washroom.
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That whole rooster thing was confusing til your most recent post.
You won't find people saying cock for rooster in my home region as it sounds like coque - which is French of course and MUST be avoided at all costs. Cock for penis, that's the norm. But cock for rooster - again, showoffy and Frenchy. Nope.
It's a funny region. They're proud of being UEL but don't much care for the English or French (other than Queen Elizabeth and her family).
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Always interesting to hear/read how differently people use language, and how others perceive it.