The ABC Wednesday link generally is available beginning at 4 p.m. Tuesday, London (UK) time. What time is 4 p.m. Tuesday in the UK where YOU are? Check out The World Clock – Time Zones. It calculates the time for several cities, and takes into account the differences in the changes in Summer Time/Daylight Saving Time. Or use the Time Zone Converter for a location-to-location calculation.
Incidentally, a map of those ST/DST changes can be found at WorldTimeZone.com.