Mate, at £23 a CFL you might want to consider saving for a HPS/MH. Do you have the space? Only £65 or so for a cheap 250W ballast
My setup is a cheap as they come for a 400w self watered (groan) system. Say £90 for a cheap ballast and hood, 2 bulbs at £10 each, Nutes £25 grow and bloom, £10 boost, £20 2 blower fans, £20+ clone gel various things like thermomiter etc.
Plus I dont mind watering myself with only 6 plants or so, any more and it becomes a chore. Plus it makes me keep more of an eye on my babies
So under £200 for the absolute basics to sustain life! Bearing in mind you'll need or already have alot of that anyway.
Im sure there's more bit's and bobs that have cost money like chains and fittings etc but you could scrounge or improvise that on a budget.
Good luck with the grow mate