In an earlier contribution to this discussion,
Colin Wilson wrote:

You can't *legally* change the times at which you receive off-peak
electricity.

Not strictly true - there`s a tariff called Option 14 available from
some suppliers that gives you 14 hours of "off peak" electricity -
from 9pm to 8am and from 1pm to 4pm

OK - what I was trying to say is that your supplier defines the timing of
the off-peak period and you're not allowed to tamper with the clock - which
was what the OP was suggesting doing.

If you can change to a more suitable tarrif, then fine. However, my
impression is that, as storage heater technology has improved, the tarrifs
available to new customers have become more rather than less restrictive -
with no daytime boosts etc.
--
Cheers,
Set Square
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