After a conversation with my neighbour who has been here for 5 years & didn't know about this butcher, I thought I would share this in case there are others too.
El Zoro in Parque Del La Reina, wonderful, his staff are friendly, multi lingual, you can buy beef joints with fat, pork joints with skin (crackling) lamb, mince good enough for steak tartare, pork chops, marrow bones for your dog etc. At Xmas the choice is never ending, the usual turkey etc. he also has wild boar, venison, & more. The meat is the highest quality also, as he told me he imports from Andalucia on the mainland, it is chilled not frozen, unlike the meat from Brasil & Argentina mostly sold here. He has now extended the shop to a restaurant so you can pick the meat from the butchers & they cook it for you, yummy & very cheap too. Enjoy !