Kew and The Royal Parks are changing how they plant and water as drought puts pressure on green spaces.
A report on the future of Thames Water, urging the government to take action, has been published.
The water supply in Royal Wootton Bassett in Wiltshire has been cut off five times in two years.
Many complaints were about affordability, after customers saw steep hikes to bills.
The group says the proposed Abingdon reservoir should be considered a critical national priority.
The latest phase is part of Thames Water’s biggest upgrade to its network in 150 years.
One walker says he is worried after he let his dog swim in the water.
Thames Water carried out storm discharges at sites across Oxfordshire over the bank holiday weekend.
Thames Water says it will now aim to reopen Osney Bridge, in Oxford, in time for 20 September.
