Would a national grid count as one infrastructure system?

Would Britain's national electricity grid qualify as one connected item in the transfer-to-1875 scenario?

Yes. The answer accepts the grid as one system despite segmented control, using shared supply between Scotland and London as its example.

The infrastructure-transfer rules prompt a separate question about whether a national electricity grid counts as one connected system. Segmented control is distinguished from physical interconnection. Scottish hydroelectric generation meeting a rise in London demand is used to illustrate the connection. On that basis, the British grid is accepted as one item within the scenario.