I already left a post about this in the other thread.

https://www.themoviedb.org/tv/88-as-time-goes-by/discuss/5f7b32fad5ffcb0036a62cf7

Thanks for the link. Here to the Geoffrey Palmer Discussion Board.

Very sad news. I didn't know much of his other work (pretty sure it was all with Judy Dench as well) but the character Lionel Hardcastle is one of my favourites from one of my favourite shows. R.I.P.