if the fire isn't the sort that you can put out with a small extingisher, it's time to evacute and call 999

you normally needs 2 extinishers on each floor, but different types to deal with different fires etc

basic ones are CO2 (electrical and liquids), water (wood and paper) and foam (paper, wood and liquids) so a combination of all 3 plus the blanket should see you ok

don't forget that these little tiddly ones will give you probably 15/20 seconds of giving it large before it's time to run away, so if you are going to bottle it then do so while you have a clear line of sight to your escape