I think you'll find that the contracts (which we are all deemed to have seen {by using their electricity}, even though most haven't!) cross-refer to DNO regulations, not to mention ESQCR (which is 'law').
25.—(1) No person shall make or alter a connection from a distributor’s network to a consumer’s installation, a street electrical fixture or to another distributor’s network without that distributor’s consent, unless such consent has been unreasonably withheld.
Even if that doesn't catch removing the fuse. replacing it is making a connection.
Quite so - and provided one knows what sort of cutouts 'to go nowhere near' (which may also be true of DNO personnel!), an awful lot safer than doing things with live tails!
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