How do I get rid of a wasps nest in my loft?

Ortho spray. The new stuff sticks like shaving cream. The old stuff was runny.

Bottle trap - http://cgbarbeau.blogspot.com/2010/07/natural-ways-to-get-rid-of-bees-and.html

try and trap them FOREVER, they come back

First job it to actively get rid of the nest

At night when they are drowsy. Wear protective clothing- two layers of long sleeves, heavy gloves, some kind of goggles, a hat, a scarf (think cover all your skin) dust mask 1 can Raid Wasp and Hornet killer, sorry there is nothing organic that works. Spray the nest really good and leave the area over night. Second night, put on your Armour suit again one or two maybe were outside playing and now returned to see their buddies dead. Bring the spray can in case they are there. Remove all the nest with a putty knife and throw it away. Don't leave the nest open in the trash for a week, they will find it.

Now seal up their entry way and set some bottle traps outside near where you have fruit trees or a pepper tree or whatever attracted them

here is a great article https://www.wikihow.com/Get-Rid-of-a-Wasp%27s-Nest

here ya go - https://www.hometalk.com/diy/outdoor/pest-repeller/how-to-remove-wasp-nests-10167526

How to Remove Wasp Nests