Best answer by woz
You are on an E7 tariff, 9 is giving day and night added together (give or take, it appears to be a few kWh out but that could be some sort of residual)
Pressing 6 TARIFF/ ZERO RATE/ ACT RATE/IPRO2/SICHG7 (? Disappears too fast)/ IMP RO1, 1344 /IMP RO2,6795
Your day reading is 6795 your night reading is 1344 (6795+1344=8139). Gas 2238
(Estimated. Electricity: Day 6632, Night 1047 Gas 2095, so you'll see a corrected statement...)
If you have mobility issues being on the PSR is perfectly valid, it covers a wide range of issues, but it's not mandatory, and you seem to have managed to get readings so it's up to you.
Not sure what your balance is but unless it's a long way in credit you may need to increase your DD (or PP may do)
Thanks for the comprehensive reply - I think we got there in the end!