They switch at the same moment, they're both defined to switch at 0100 UTC. So in London it will go from 0059 to 0200 in the Spring, and from 0159 to 0100 in the Autumn
In Berlin it goes from 0159 to 0300 in Spring and from 0259 to 0200 in the Autumn.
Making the change at 0100 UTC is pretty convenient if your timezone is close to the zero line, because most people will be asleep or at least in bed and won't care. It's not so practical near the dateline where 0100 UTC is the middle of the day.
In Berlin it goes from 0159 to 0300 in Spring and from 0259 to 0200 in the Autumn.
Making the change at 0100 UTC is pretty convenient if your timezone is close to the zero line, because most people will be asleep or at least in bed and won't care. It's not so practical near the dateline where 0100 UTC is the middle of the day.