The last August Monday is the Summer Bank Holiday throughout the whole United Kingdom. Taking into account that this is a big national holiday, a day-off is expected. For most CFD on indices no changes are found, but the exception is FTSE100: the trade on it will be suspended.
We also have some good news: the situation with DJI30 is now better, comparing with August 24 ("Black Monday", as you remember). On that Monday it decreased by 1,000 (!) points and broke its record this way.
Don't forget, please, to complete your portfolio with indices and ask our team or see our site for more specific information about CFD trading schedule.