How Can I Stop Slugs Entering My House At Night? I Have A Problem With Slugs Getting Into The House At Night And Leaving Disgusting Slime Trails, I Have Put Slug Pellets Outside Doors But Still They Get In Any Advice?

Don't use slug pellets next to the house! The little blighters are attracted to the pellets so you might make it worse.
They don't like crossing salt, copper tape or WD40 (or so I've read on another forum).
They do like (so much they'll gorge themselves and die) beer or porridge oats.  
I'm going to try WD40 round the airbricks and a homemade trap of oats a metre or so away from where I think they are getting in.
Fingers crossed :-)

I have heard that filling a lid (like the one off of a pickle jar) with beer and leaving it near the areas they enter will get rid of them. They like the smell of the beer but then they crawl over the lid edge they will drown. Wet down the entryways and then sprinkle table salt generously on them. Salt burns their skin.

We have seen slug trails in the morning when we get up that are around our chairs, it now has moved out into the middle of the living room. I have tried to keep it cleaned around the chairs. They seem to be comeing in around the heater vent. How do we keep them from comming in?

Try bleach and then salt water...?.

Salt

I've used filler on both the inside and outside of my rented property to stop the little blighters coming in. It does stop them from entering those holes, but they will always find another way to come in. You can tell if you've nearly won, if you only see much tinier slugs coming in the same area. Though like I said before they will always find another way to come in.