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the Gentleman's Wargames Parlour (old version!)
Warlords Forum is back up again now, has been for a little while https://www.warlordgames.com/community/ but has lost all of it's previous content and seems to be losing traffic to the facebook groups for it's games.
Pendrakenforum.co.uk is an excellent one. Primarily related to the company's 10mm range, of course, but not exclusively, and there's a lot of good humour mixed with devoted gamer-headedness. Much recommended.
Indeed TMP is just missing the flush button. Hard to believe it was a go-to years ago I guess “years ago” says it all ...
Actual footage of the mutual self destruction of TMP and Frothers (circa 2013, colourised)