permethrin, which/where to buy UK

[Bedspring]

I would like to buy some permethrin to spray on my Sleeping Bag/ Liner.
I have previously bought LifeSystems https://tinyurl.com/2frfrty8 which as I did not get bitten by mosquitoes, maybe worked, but it is expensive.
I have seen this https://tinyurl.com/yc7aba7f which is cheaper by volume.
Has anyone any comments on these or have any other suggestions please.
As said in subject line I am UK based,

 

[EricJR]

I have seen this https://tinyurl.com/yc7aba7f which is cheaper by volume.
Has anyone any comments on these or have any other suggestions please.

I actually just got one of these - it arrived in 2 days from Amazon. I've given my backpack a thorough spray, and it's now drying outside. No obvious problems. The bottle has a screw cap, and comes with a spray nozzle that you switch to for using it, then you can screw cap it properly for storage - useful, because I can't imagine I'll need it again for another year.

 

[Jotown]

I’ve always used this …UK based.

Sawyer SP657/SP649 Permethrin Insect Repellent For Clothing & Gear 710ml/355ml | eBay

This insect-killing repellent for your clothing is effective against ticks, spiders, chiggers, mites, and mosquitoes for up to six weeks (or six washings). It’s odorless after drying, and one application to your clothing can last up to 6 washings.

www.ebay.co.uk