The first stage of weekly capping on Oyster cards is almost here. From next Monday, 17th December, bus and tram fares will count towards a weekly as well as a daily cap. Just like contactless the weekly cap will apply to journeys made between Monday and Sunday. If you reach the bus and tram cap every day this means that on the 5th day you will be charged less as you will have reached the weekly bus and tram pass price, the same as the weekly cap.
Note: This only applies to blue adult Oyster cards. Concessions should continue to buy the weekly bus and tram pass to take advantage of the discounted rates.
At the moment rail fares (inc tube and dlr) will still only cap on a daily basis on Oyster. TfL hope to roll out the next stage in the spring of 2019.
The bus weekly capping was supposed to have started today, 10th October, but the problems caused by the recent O2 network outtage have necessitated a short delay.