I don't what's going on here this summer odd one or two small house spiders but the daddy longlegs - harvestman type spiders are every where. Some mornings you can't walk into a room without getting a face full of spider webs I catch them up throw them out and next day there they are again. Still the conkers will soon be ripe and will be appearing on all window sills and door steps, the wife thinks it works ian
I don't know what is invading your house Ian but it's not harvestmen (Opiliones) - they have no silk gland and do not spin webs. There are some long legged spiders and just to confuse things, some short legged opiliones! These articles might help make things more clear.