Humour such a subjective thing - I tried Bill Bryson and just didn't get on with Notes from a Small Island.
My suggestions are:
"The Cat who came in from the Cold" - Derek Longden. A writer "adopts" a kitten - the bit with the Christmas tree is especially delightful
"A Cat Called Birmingham" by Chris Pascoe
"The Unadulterated Cat" by Terry Pratchett
"An Utterly Impartial History of Britain or 2000 Years of Upper-class Idiots in Charge" by John O'Farrell
Richard Conniff - several books on wildlife research - as a journalist he meets the researchers and writes about both the research and the researchers. Not necessarily laugh out loud, but very amusing. He is not poking fun at them, but there are some delightful stories. (The entomologyst who served in the US army and his men were forever showing him the moths they'd squelched with the rifle butts when they were drawn into the searchlights.)
He has also written a fascinating book called "The Natural History of the Rich"
My Family and Other Animals and the sequel Birds, Beasts and Relatives by Gerald Durrell
George McDonald Fraser's McAuslen books, starting with The General Danced at Dawn - life as a young officer in the Gordon Highlanders just after WW2. A mix of his mistakes and the "challenges" he has in his platoon (especially Private McAuslen)