Lines with Mechanical signalling/traditional signalboxes:
- Penzance-Liskeard
- Gillingham-Exmouth Junction (soon to be resignalled under the control over Basingstoke ASC)
- Wool-Poole (although mainly colour lights, soon to be resignalling under the control of Basingstoke)
- West Wales, Carmarthen area
- Havant-Working (Portsmouth Main line) still has local signalboxes, although with colour lights
- Littlehampton/Bognor- Horsham
- Eastbourne/Hastings area
- Ramsgate/Canterbury/Dover area - to be resignalled under East Kent resignalling
- Cotswold line (being partially resignalled, later recontrol to Didcot)
- Marches line
- North Wales
- Worcester area (later to be resignalled to West Mids SCC)
- Ely-Norwich (being resignalled, to be controlled by Cambridge)
- Great Yarmouth/Lowestoft area
- Derby-Stoke-on-Trent
- Shrewsbury-Crewe (being resignalled to Cardiff)
- Syston Junction-Stamford area
- Werrington Junction - Gainsborough via Sleaford, Skegness line, Carlton-Lincoln, Lincoln-Cleethorpes, Sheffield-Barnetby (though PSB at Worksop, and Westcad at Lincoln).
- Hope Valley line
- North Trans-Pennine, though being partly resignalled and PSB at Hudderfield
- Buxton area
- Blackpool line (though will be resignalled under electrification)
- York-Leeds via Harrogate (though being resignalled)
- Transpennine line via Hebden bridge
- Pontefract area
- Doncaster-Hull
- Hull-Scarborough
- York-Scarborough (though recent resignalling at Scarborough itself)
- Settle and Carlisle
- Cumbrian Coast line
- Newcastle-Carlisle
- Middlesborough area, Though PSB at Tees
- Carlisle-Glasgow via Dumfries
- Ayr-Stranraer
- Stirling area
- Cupar area
- Aberdeen-Inverness
- Highland Main line, though north half controlled from panel inside Aviemore SB
- Dundee-Aberdeen (though PSBs at Dundee and Aberdeen)
Still local boxes at Stafford/Around Crewe/Stockport/Liverpool on WCML
Other than above some forthcoming re-control resignalling
Slough IECC to Thames Valley SC in December
Slough PSB and Swindon B soon after that
Leicester PSB to East Midlands SC in next 24 Months
Nottingham area to East Midland SC shortly
That's my latest info, feel free to correct or add