Quickybaby's latest youtube vid stated that the next patch is coming mid next week and that is the date the 183 will be removed ?
From 1 minute 38 seconds he makes an announcement: https://www.youtube.com/watch?v=g-TsjD2Y7uk&t=559s
1 week warning of patch incoming and 183 removal
He's talking about the T10 British heavy, FV215b not FV215b 183 TD. Official line on the latter is that it will be replaced in the future, so if we speculate the earliest that will happen is patch after the one next week. The replacement Badger vehicle isn't on the sandbox or the common test as far as I'm aware so will be surprise of the year if it will actually happen during next patch.