The principle of the machine working, and working reliably is very important.

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IPOs are not in principle severable from the working or failings of the secondary market.

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In principle, the tri-partite structure of three working groups encompassing basic science, adaptation and economics should produce a relatively coherent whole - more so, and with a more impressive imprimatur, than if each were assessed on its own, perhaps against the backdrop of turf wars.

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All secondary headteachers agreed in principle to develop a working group to explore the benefits and efficiencies of implementing the 33-period week.

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While markets may be having adverse short term reactions to Dijsselbloem statements in light of how badly the Cypriot deals were managed, the principle of a European Wide resolution regime have been in situ since a European Commission working paper was published in January 2011.

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