On Monday, 8 July 2019 14:01:47 UTC+1, T i m wrote:
That got me thinking about getting her a wireless energy monitor
thing, even if only their current usage, rather than anything that
would indicate the costs etc?

Better would be to put the property onto a standard credit tariff.

Apart from anything else it will save the executor accounting for cash to pay for the top-ups.

NB Bulb is "pay in advance" on credit tariffs too.

Owain