Another trend is the growing availability of internet access on board aircraft.

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Cotterill, who has been linked with the vacancy at Sheffield Wednesday, has offered his availability to Cheltenham as a sounding board in the selection process for finding a new boss.

BBC: Steve Cotterill turns down Cheltenham Town return

Another obstacle to the spread of on-board devices may be the availability of hand-held ones, in the same way that carphones have largely given way to mobile phones.

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