Moving from London to Corralejo

There are working visas, but they're VERY difficult to obtain. 

The employment visa is for if you are offered a job by a Spanish company (or a foreign company with a Spanish presence). However, the company must prove that they have been unable to fulfil the position from local people.  The company has to complete a mound of paperwork, and then they have to get your visa started.  Sadly, therefore, they just don't even try.  As unemployment is high here, unless it is a highly specialised job, they will be able to fill the position locally.

The self-employment visa is also not that easy.  You must be able to prove that your business will not fail and be able to support you.  This will be by a very detailed business plan.

There is also what is termed the 'golden visa'.  For this, you must invest a minimum of €500,000 into property here.

You can see more details on moving here, along with links to the official pages, here