Sunderland, Swindon, Wakefield, Watford - We expect services to remain available for the duration of the maintenance window except for a 10 minute window as upgraded devices are rebooted.
Solihull, Bentley Heath, Slough, Sheffield, Southend-on-Sea - We expect services to remain available for the duration of the maintenance window except for a 10 minute window as upgraded devices are rebooted.
Reading, Portsmouth, Rotherham - We expect services to remain available for the duration of the maintenance window except for a 10 minute window as upgraded devices are rebooted.
Milton Keynes - We expect services to remain available for the duration of the maintenance window except for a 10 minute window as upgraded devices are rebooted.
Leeds Leicester - We expect services to remain available for the duration of the maintenance window except for a 10 minute window as upgraded devices are rebooted.
Gloucester, Havant, Harpenden, Huddersfield, Inverness, Ipswich and Kettering - Customers will experience an outage of 10 minutes during the maintenance window.