All registries are open Monday to Friday. Most are open 9.30am to 4.00pm, but there may be some minor local variations: (e.g. in London, the hours are 10.00am to 4.30pm), so you are recommended to check before attending. Interviews are by appointment only and are arranged by the District or Sub Registry.
Details of interview venues can be found in leaflet PA4 - Directory of Probate Registries and Interview Venues
Contact details for individual registries can be found in Courtfinder