Difference time between United kingdom and Guinea Bissau in hours, minutes, and seconds is [ ] with gregorian date today is Saturday 21st of March 2026 in British local time, Where the time now in United kingdom is 00:25 AM and the time now in Guinea Bissau is 00:25 AM in Guinea Bissauan local time and the time comparison between United Kingdom of Great Britain & Northern Ireland and Guinea Bissau in greenwich time ( GMT ) where United kingdom advanced about greenwich time ( GMT +01:00 ) while Guinea Bissau he has the same greenwich time ( GMT +00:00 ).