It was undesirable to impose consecutive indeterminate sentences or order an indeterminate sentence to be served consecutively to another period of imprisonment. Where the judge would want the period before which the defendant would become eligible for parole to be consecutive to an existing sentence or to follow a period imposed under the Powers of Criminal Courts (Sentencing) Act 2000 s.116, the judge should increase the notional determinate term to reflect that balance or that period before halving it to reach the minimum term.

[2006] EWCA Crim 1741