A Wimbledon based charity is working “round the clock” to bring relief to disaster-hit Pakistan.

The head of Humanity First described the flood that devestated the country earlier this month as “worse than anyone back home could imagine”, and urged Britons to support its efforts to help the survivors.

The Deer Park Road charity has sent supplies to the country including buckets, sheets, shoes and more than 500 tents. It has also joined with Rotary Club-backed charity Worldwaterworks to hand out sanitation equipment, and plans to deliver food parcels in some of the worst affected areas for the next three months.

A spokesman for the organisation said its aid workers who were already based in Pakistan before the tragedy struck had been sent to respond to the crisis on the ground - but extra volunteers had been drafted in to help at the Wimbledon headquarters. Humanity First doctors have also set up three medical camps in the country.

In a statement from the charity’s field headquarters in Islamabad, chairman Ahmad Yahya said: “The situation is much worse than anyone back home could imagine. Its like all of South England up to Birmingham being under water, and everyone sheltering in the forests.

“Our team is working round the clock to run medical camps, provide tents, water treatment boxes - thanks to the Rotary Club - and food packs. We expect the disaster response phase to last three months, so the donations of ordinary people in the UK are desperately needed.”

The floods, which began about three weeks ago, have killed 1,600 people and destroyed or badly damaged 700,000 homes, leaving millions without shelter.

To donate visit unicef.org.uk/donate_pakistan