Deputy John Gollop said it could be part of a three-tier system offering different types of buses for different purposes in Guernsey.

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Graham Newman, cabinet member for education, said it was a "fact" that pupils educated within a two-tier system outperformed those educated within a three-tier system.

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In its School Organisation Review, Suffolk County Council is replacing the three-tier system of primary, middle and secondary schools with the two-tier system which cuts out the 40 middle schools.

BBC: Suffolk's middle schools closure programme starts

The three-tier system can be a very good thing.

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At the moment, Costco cannot buy directly from out-of-state vineyards, but must go through Washington's three-tier distribution system, complete with mandatory mark-ups.

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The RAC also wants to see the introduction of a three-tier warning system for over-the-counter drugs so drivers know at a glance which drugs pose a driving hazard.

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The CDU champions the traditional three-tier high-school system, in which pupils are separated early (usually at ten) according to ability.

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The standard was raised six times during the Clinton administration, the last of which raised the tier-three requirement to 85, 000 MTOPS, about the level of a networked system with 32 Intel Pentium III chips.

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