Hi I am due to travel to Mojacar in may I am not boosted can I still travel if I do a private lateral flow tests

There's plenty of time to to get a booster, for your own protection primarily, but also for other's

I stand to correction but I think it’s full Vax certificate with last shot less than 152 days - I’m not certain about PCR tests etc

The current restrictions banning anyone from non EU countries that are not fully vaccinated have just been extended to end of April, this will very likely be extended beyond that date so if you are not boosted by May and having had the jab at least two weeks prior to travel you will likely not be allowed entry and may also incur a fine as well....

We are flying in tomorrow the locator form asks you to confirm vaccination status either full regimen or booster. You put in where you had vaccine. What type and what date. If all goes well the results get validated. You then get your QR code which you can print and or download to your wallet  my granddaughter is coming with us. She has just had the two doses only being 16. Hope this helps. 

I agree that the easiest and cheapest solution would be to get your booster. Make sure that it in time though as I think that it takes a couple of days from the jab, for it to appear on your Covid pass.

In the absence of a booster, you can still travel to Spain as long as you have had a certified lateral flow test within 24 hours of travelling. In other words you will need to go to a private company the day before you fly, for them to do the test and issue you a certificate that you can then show the Spanish authorities by referencing on the passenger locator form. You will be able to Google your nearest clinics/sites. It will cost you. I think ours came to £40 each. 

Fully vaccinated with the last vacccine no more than 270 days ago...if not... .cant come

Last vaccine must not be older than 270 days ago...

Hi

Would you know what the entry rewuirements are for coming back into spain from uk if you have residencia? 

For all entry requirements, probably the best place to refer to is the appropriate Spanish site:

https://www.spth.gob.es/

Note though, that the determining factor as far as Covid is concerned, is where you are coming from and your vaccine status, not your resident status. After all the virus is unlikely to be deterred by whether you are a resident of Spain or deepest, darkest Africa for that matter.