Does  anyone know if there are any restrictions when transiting via singapore  (on singapore airlines) to Bangkok ie extra pcr tests etc as I seem to remember on here that someone mentioned it. sorry if wrong as getting old now lol.

Travellers from Thailand, including those in transit, can access the Vaccinated Travel Lanes from 15th December

https://www.singaporeair.com/en_UK/sg/travel-info/vaccinated-travel-lanes/

Check the link below to SQ covid-19 info page. A key point being to transit through Changi Airport requires a covid test taken within 2 days, not 72 hours. (unless you have been in a "Category 1" country for 14 days.)

 

https://www.singaporeair.com/en_UK/us/travel-info/transit-through-singapore/

 

Take a pre-departure Covid-19 test

Travellers, including Singapore citizens and permanent residents, transiting through Singapore will be required to take a pre-departure Covid-19 test within two days of the scheduled departure date of their flight.  

The test must be taken at a recognised or accredited clinic, laboratory or medical facility. Please note that self-administered pre-departure Covid-19 tests will not be accepted for transit through Singapore. For a smoother check-in process, you should check if the clinic is able to provide a test certificate with a corresponding QR code. This QR code should link to your digital pre-departure test certificate.

View test locations near you >

This requirement does not apply to travellers aged 2 years and below (i.e. born in or after 2019), as well as travellers who have been in Category I countries/regions in the last 14 days. Please note that while these passengers are exempted from the pre-departure test requirement to transit through Singapore, they may still be required to produce a valid negative Covid-19 PCR test certificate if it is required for entry into their planned destination.