(The post above was only spam, so that's why I removed it).
While you're waiting for Prudie:
The
present rules for people from the UK seeking to enter the Canary Islands require visitors to provide proof of a negative NAAT test (which, in practice, means a PCR one) carried out no more than 72 hours prior to arrival. The cost of a PCR test in the UK will vary between providers but, as a guide, I know that one pharmacy in Ipswich is charging £145 for one. Rapid antigen tests (also known as lateral flow tests) aren't acceptable.
You can theoretically enter the Canary Islands just using your proof of full vaccination instead of a PCR test result but, as yet, there's no reciprocity agreement between the EU and the UK for vaccination certificates, so your NHS proof of vaccination isn't currently valid for entry into the islands. (That might change before you travel though. If it does, and the EU agrees to accept the UK's proof of vaccination, you won't need a PCR test).
The information above was largely derived from here
https://www.hellocanaryislands.com/travelling-to-the-canary-islands/
which is a website provided by the Spain's Ministry of Industry, Commerce and Tourism (and which is linked to by our own Foreign & Commonwealth Office website) and is thus definitely 'official'.
For returning to the UK, you'll need to take a Covid test within the three days before you travel. The test does NOT have to be a PCR one; lateral flow tests can also be used. (Source:
https://www.gov.uk/guidance/coronavirus-covid-19-testing-for-people-travelling-to-england ). The Spanish Airports authority (Aena) has teamed up with a company called Eurofins to provide testing facilities at many Spanish airports, including Lanzarote. The cost is approximately €30. You can book a test directly through the Eurofins website or by downloading their app:
https://eurofins-megalab.com/en/eurofins-megalab-is-carrying-out-testing-for-covid-in-12-spanish-airports/