Comments on this one huns
It’s not your fault that you loose an hour so therefore that lost hour you can interoperate as reducing your rest to a lesser hour to fit in with your own shift pattern.
will you work the shift on reduced rest 8 hours and not 9.
Take into account health and safety.
Sleep deprivation.
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will you work the shift on reduced rest 8 hours and not 9.
Oh dear. 
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It’s not your fault that you loose an hour so therefore that lost hour you can interoperate as reducing your rest to a lesser hour to fit in with your own shift pattern.will you work the shift on reduced rest 8 hours and not 9.
Take into account health and safety.
Sleep deprivation.
Why would you have eight hours rest when you know the regulations clearly say you must have at-least nine hours rest, the clocks changing don’t mean you can reduce the daily rest to eight hours any more than it means you can reduce your weekly rest to 44 hours without it being a reduced weekly rest period 
Anyway if you use a digital tachograph and only have eight hours rest it will be obvious because UTC time doesn’t change and that’s the time used by the digital tachograph for recording your hours.
I don’t think you really thought this through did you 
Your right … Was concerned about the tacho time being out of synch with bst , as I never did a shift when bst starts and ends. Thanks
Just imagine your daily rest is timed by a stopwatch not a clock and you’ll be fine.