I've had a few quotes asking for out side lighting. You get the usual question "why cant you just run a wire up there?" Not wanting to big the job up for my self I've usually gone down the SWA or conduit route where applicable. I've had a look through the good old 17th and can,t easily see an guidance on when I can and can't use flex with out protection, or what sort. I remember something about it being at hight was enough protection e.g. 1.8m. The chaps at the local wholesale said it must always be SWA. I think they may just have a bit too much in stock. Off for a BBQ in the garden now v.hot out side, I can see a few more enquires for outside lights. Useful to know if I can get in with a competitive price on the right side of regulations.