It's not terribly surprising that a small island's per capita production is higher than the UK's, but it's less than 600k tonnes in total per year. This table on Worldometer (remember Covid?) is still showing 2022 figures, but that slots us in somewhere around 176th place, below Gibraltar who produce three times as much per capita.
That far down the table, of course, the IOM's percentage of world emissions rounds to 0.00%.
Interestingly, Iceland with all its geothermal advantages has a higher per capita production than we do. I wonder if they're counting volcanos?