This is another little helper that you may not have heard about. I spotted it somewhere and rang about mum and, not surprisingly, I was told she qualified. All companies must offer this.
The thing that surprised me was I was eligible to go on the register too under two criteria one of which was just that I was a pensioner so it should apply to all on here.
The criteria are:
Those of pensionable age.
Those with a disability.
Those with hearing and/or visual impairments.
Those with long-term ill-health.
This is not offering any money or credit but does make them aware you may need a quicker visit in an emergency or that you have a particular vulnerability.
You may also not know that companies are also obliged to offer free gas safety checks to customers who fit specific eligibility criteria.
This document:
https://www.ofgem.gov.uk/ofgem-publications/75552/vulnerable-consumers-and-priority-services-register-june-2013-bt-pdf gives details of the benefits of being on the PSR. Some of them may not be relevant now but become so as we get older so worth registering now in my opinion.