Found this on another forum posted by a member of staff from bailey. But it does mention Series 6 though.
Hi
I can confirm that the awning rail height for a Senator Series 6 Wyoming is 2.43 metres.
Best Regards
Kelly Watts
helpine@bailey-caravans.co.uk
Most Air awnings I believe are between 225 and 250, a quick look at the Kampa, bradcot and the Vango all state these measurements.