Merge pull request #1254 from SpiNNakerManchester/energy_fixes #4102

Job	Run time
call / tests (windows-latest, 3.12, tests)	2m 48s
call / checks (ubuntu-latest, 3.13)	2m 21s
call / tests (windows-2019, 3.9, tests)	2m 14s
call / checks (ubuntu-24.04, 3.11)	2m 28s
call / tests (macos-latest, 3.13, tests)	1m 17s
call / checks (ubuntu-latest, 3.10)	2m 38s
call / tests (macos-13, 3.9, tests)	1m 34s
call / checks (ubuntu-22.04, 3.9)	2m 31s
call / checks (ubuntu-20.04, 3.8)	2m 55s
call / validate (ubuntu-latest, 3.12, validate)	3m 5s
	23m 51s

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