I'm looking for a good, reliable one that protects my hair when blow drying and straightening that is £5 or under, really..

I use Regis straight iron spray, it's a heat-protector and it helps keep your hair straight... also, if you have any retailers around you that sell products for a Chi iron, those really work! You don't even really need a Chi straightening iron to use them, they are heat protectors and straightening sprays that you use with really high-temperature irons and blow dryers. Hope this helps!

Well spray/serums Are Not Going To Wrk Get Sew In Hair Extentions

I use John Frieda Thermal Protection, it protects your hair and keeps your hair straight and shiny after you straighten it..It costs about $8 (US Money)

Their is one by aveda and it works well and smells awesome try that .... Good Luck

frizz ease hair serum or garnier fructis hair serum

i like VO5 Miracle Mist heat defense conditioning spray. it works well and is only like $3

Frizz-Ease has a few that are pretty good, pantene also has a new spray in protectant as well as an extra moisturizing repair and protect conditioner and they both work well. My favorite spray in protectant is by Total Effects and its in a purple bottle. It smells good, isnt heavy at all, and works great. All of these are under $5.

TRESemme Heat Defence Styling Spray