"Nick Buckles made a massive contribution to the group over a 28 year career, " said G4S chairman John Connolly.

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The Liberal Democrat group said the contribution had been "little more than a vanity project" for the Tory group.

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"Leon has been part of a close knit coaching group at Wasps for the last two and a half years, making a valuable contribution to the way we play, both in the forwards as a team, " he said.

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He uses a 12x multiple for the profit contribution from this group, well below multiples of 23x for F5, 32x for Riverbed and 45x on Aruba.

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Some schools will allocate a portion of contribution revenue to football while other schools will instead group the income as athletic revenue unallocated by sport, even though football is attributable for its vast majority.

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Here's how the tax deduction works: You make a contribution to a 501(c)(3) tax-exempt group sponsoring your research, which pays for project expenses, including scientific equipment and your own room, board and, sometimes, ground transport.

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Dean Sullivan, chair of the working group, said he would "strongly encourage anyone who has not yet responded to the consultation to make a contribution".

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