Speed up wordpress site following GT Metrix results of pagespeed F & Yslow E

I did a speed test on GT Metrix and got poor results of; PageSpeed Score F (46%) YSlow Score E (57%) I would like a developer to speed the site up following the recommendations given in GT Metrix; Pagespeed; enable gzip compression leverage browser caching combine images using CSS sprites optimize the order of styles and scripts minify javascript Yslow; add expires headers make fewer https requests compress components with gzip use a content delivery network Our website URL is www.sandwellrattanfurniture.co.uk. UK PROPOSALS ONLY PLEASE!