June 2020 update - BBC

June 2020 update. a/an. Pronunciation is the key. Use "an" before any word or abbreviation beginning with a vowel sound, including words beginning with a silent "h" (as far as we know there are only four of these: hour, honour, heir, honest and their derivatives).You use "a" with consonant sounds (eg: unicorn), including words beginning with an "h" which is pronounced (eg: hat, hotel). ................
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