Please check before travelling whether your destination requires you to self-isolate when you arrive, or whether you will need to do so when you return to the UK. You can find full details here - / Red, amber & green country info (https://www.gov.uk/guidance/red-amber-and-green-list-rules-for-entering-england#green-list)
Seems a decent price if you have friends / family in Gibraltar. Please note the entry requirements to Gibraltar below. If you are fully vaccinated a lateral flow test (LFT) is required to be taken within 24hrs of arrival in Gibraltar (this test is free). If you are not fully vaccinated, you must take a LFT no more than 48hrs before your flight departs and then follow the same procedure as vaccinated citizens (taking another LFT within 24hrs of arrival in Gibraltar). The price is based on taking a small piece of hand luggage only (i.e backpack 40x30x20cm).Entry Requirements
If you have only been in countries or territories on the green list in the 10 days preceding your arrival in Gibraltar by air and are fully vaccinated, then you must upload your vaccination certificate on the Passenger Locator Form. You must book a COVID-19 lateral flow test before arriving in Gibraltar. This test is free.
This test must take place within 24 hours of arrival. If you are remaining for more than 7 days, you must also take a second test on day 5.
If you have only been in green list countries in the 10 days before arrival and are unvaccinated, you must have a pre-flight COVID-19 lateral flow test taken no more than 48 hours before your flight to Gibraltar. Before you travel to Gibraltar you must also book a COVID-19 lateral flow test, to be taken in Gibraltar within 24 hours of your arrival. If you are remaining in Gibraltar for more than 7 days, you must also take a third test on day 5.Example dates:
5th - 16th July
7th - 14th July
14th - 21st July
+ Many more