If it has stripes around it's body it would most likely be a colubrid-- maybe a king, rat or corn snake, and it was probaby someone's beloved pet-- snakes are very intelligent and investigative creatures and are notorious for escaping! These species hail from America and shoud do well in our hot summers, not sure about over winter though. Oh-- and the are definitely not dangerous!!
If you do decide to look for it and want to pick it up, you should wear gardening gloves (they do bite out of self defense and, although not dangerous, can be a right pain to get off!)
However if you cannot 100% ID the snake I would not attempt to pick it up, as there is alwas that tiny chance. It's probably on the hunt right now- this is the best time of night to find the rodents (sometimes birds and amphibians) the feed on.
I agree with CyberFae, accept i would wear and longsleeved jumper and gardening gloves and bring a empty pillow case, then when you see the snake you can put it in the pillow case and tie it closed, if you see the snake, grasp it, in the centre of its body and put it in the pillow case
Let us know how you get on :thumb:
In all likeliness they would not have reported it. If you can't find an escapee in your house it's pretty much gone forever! It may still be worth putting up posters in the local area and checking with the police though.
If the snake gets into an S shape on the top half of its body it means its going to strike.. but I really wouldn't wrry too much as a colubrid that size can't do much damage.. and won't get through gardening gloves.. pick it up from behind the head and your other hand half way down its body to support it.. put it in a tub in a warm area so it doesn't get too cold.. if you can then get a picture of it we could tell you exactly what it is and whether to release it or try and find the owner.