None of the time zones you listed are exactly the same as the current UK time year-round, but the UK generally uses Greenwich Mean Time (GMT) in the winter months and British Summer Time (BST) (which is GMT+1) during the summer.
Of the zones you listed, these all correspond to Greenwich Mean Time (GMT) year-round, which is the UK's standard time during the winter:
- (GMT+00:00) Greenwich Mean Time – Abidjan
- (GMT+00:00) Greenwich Mean Time – Bissau
- (GMT+00:00) Greenwich Mean Time – Danmarkshavn
- (GMT+00:00) Greenwich Mean Time – Monrovia
- (GMT+00:00) Greenwich Mean Time – São Tomé
However, from late March to late October, the UK shifts to British Summer Time (BST), which is GMT+1. During that period, the UK is not in the same time zone as these locations.
So, during the winter (late October to late March), the UK's time aligns with GMT, while during the summer it does not.