Website Optimisation Suggestions

Hi All,

So my BP site goes 'live' on Friday, it's not perfect but good enough to get out the door and start promoting.

I've been working on optimisation and just wanted to get any further improvements as I really want to get this site loading in 2-3 seconds (UK)

https://gtmetrix.com/reports/airsoftnation.co.uk/QpDDH5yL