Poor or No Mobile Signal – If you depend on your landline and cannot rely on a mobile in a power cut, your provider MUST offer a solution so you can contact emergency services.
Use Ofcoms Mobile Coverage to check

The Mobile service is variable outside and with no data for inside!!
The document to quote if they fob you off is Ofcom Emergency Access during power cuts.
A critically important function of the telephone network is to allow people to contact the emergency services. For this reason, there is a regulatory obligation on communications providers in General Condition A3 to take all necessary measures to ensure uninterrupted access to emergency organisations for their customers.




