Missing - gone awol!

Charlie is very much a ‘home bird’, if a cat can be a bird!!!! He comes and goes through his cat flap but is always close by and comes when called. Yesterday evening was a very ‘normal’ evening for Charlie, he watched tv on my knee, generally supervised me pottering around. He must have gone out at about 10:00 pm for his night pee’ but it would seem that he didn’t come back. Still missing this morning:( :(. We have checked sheds cupboards etc and asked neighbours to do the same. We have walked many times around his likely stomping ground but no sight nor sound :( :(. So a mystery.
Fingers crossed he puts in an appearance tonight. He has never done this in his 15 yrs on this planet!