hi alan, all i can say is you lucky ######, if you live there then the licence is easy, you have to go to arricife, or maybe yaza admin offices with passport photos, ni number and a small amount of cash, as vlad says, check out the search for lanzarote.
i would fish the lighthouse differently to the more 'beachy' areas, most important would be a smallish wire trace to the hook, as some of those atlantic fish are toothy critters, as you know, there is a significant tide rise and fall, i think the best is to target high water, and look for some water with a rip in it, use fish or squid baits to a normal running ledger, if you have a big rip, use fixed wire weights, there is a good tackle shop in pb, looks like a hardware shop, just up the main road before the shipyard.
had some nice bream to 5lb at matargorda using squid heads and bubble floats, cast over the black volcanic rocks, fish the float deep with a stop about 12 ft, anyway, give you a shout when i am over, some time in late april, cheers, woodsy.