This an attempt to list all the low traffic neighbourhoods made permanent, or newly introduced, in 2022. It is largely based on information collected by @iambrianjones (Filter more Streets), so is probably London-centric. Let me know if I'm missing anything.
January
- Enfield council makes Bowes Park LTN permanent
- Southwark makes Dulwich Streetpace scheme permanent
- Hounslow and Ealing decide to keep Fisher's Lane traffic-free
- Newham and Waltham Forest make two LTNs (Maryland and Odessa / South Leytonstone) permanent
- Lambeth makes Oval and Railton LTNs permanent
- Lewisham recommends the Lewisham and Lee Green Low Traffic Neighbourhood be retained and introduces new trial road closures
- Hackney makes Hoxton West LTN permanent
February
- Newcastle makes the five bridges filters permanent
- Islington starts a new LTN trial
- Newham makes two LTNs permanent
- Newcastle announces an LTN trial in Fenham
- Cambridge proposes a city-wide circulation plan
- Hackney makes Hackney Downs LTN permanent
- Bath and Northeast Somerset proceeds with four Liveable Neighbourhood schemes (and continues planning for eleven others)
- Enfield makes its second LTN (Fox Lane) permanent
March
- Islington makes the Clarkenwell Green LTN permanent
- Camden makes the Arlington Rd LTN permanent
- Hackney makes the London Fields LTN permanent
- Haringey plans two large LTNs
- Hackney makes the Walford Rd LTN permanent
- Surrey makes a modal filter in Weybridge permanent
April
- Birmingham makes Kings Heath LTN permanent
- Court of Appeal rejects challenge to Lambeth LTNs