Q4 in the UK private market saw a slight dip in sales of 1% compared to Q3 of 2021, which had been a “record quarter,” but the market still saw an overall annual increase in sales of 130k units in 2021, compared with 2020, up by 46% and up by 20% on 2019, according to an announcement from The British Irish Hearing Instrument Manufacturers (BIHIMA).