If the FCDO is not advising against all but essential travel, your trip will complete as normal.
If you wish to curtail your trip and get home quickly, this is at your own discretion. Much Better Adventures and your local host will help as best we can.
Depending where you are on the trip it may not be possible to change the route or itinerary.
All expenses for alternative travel, testing, treatment or self-isolation will need to be covered by you. It is important that you have travel insurance that covers such costs incurred.
In this scenario your host is unlikely to be able to offer any sort of refund for any portion of the trip not used.
If you do have to quarantine upon return to the UK, the British government has introduced a Test to Release scheme which enables you to reduce your quarantine period from 10 days to 5 days. More information on this can be found here.