I often get asked what I use for lighting and remote triggers, etc. so I thought it would be useful to list it here along with links to where it can be bought.
[The prices and links are valid as of July 2014]
I have 3 of the Yongnuo Flash Speedlite YN-560 II flashguns.
They have more than enough power for studio use. I usually have the keylight in a softbox on half power and shoot at f8 at ISO100.
I have 4 of the Yongnuo RF-603 Radio Triggers. Each one can act as either a transmitter or receiver, so you need one more than the number of flashguns you want to trigger.
They are £21 per pair from amazon.co.uk
I have a 120cm/47″ Octagon Softbox with grid
These are currently £45 on eBay.co.uk
I also use 2 rectangular 60x90cm Softboxes with Grids. I got mine for US $43.98 (approx £26) each on eBay.co.uk, but they seem to be currently out of stock. The next best I can find is this one on eBay.co.uk, which is £32 plus £12 postage.
Flash holder/light stand adapter
To attach the softbox and flash to a light stand, I use a Black Adjustable Flash/Shoe/Umbrella Mount/Holder/Bracket. These are £7.28 from the seller ukpartsdeal on eBay.co.uk
Remote Cable Release
To trigger the camera remotely (to avoid camera shake) and also to use for taking time lapse sequences, I use the Yongnuo MC-36 C3 Camera LCD Timer Control Shutter Remote (for 5DII and III, 7D and various others). This is currently £19 on amazon.co.uk