Blocked drain, lots of water flowing down the road after rain.

Blocked drain - again. Once again this drain has become completely blocked. It's the only drain along this section of road so everything washes down from beyond the pub, past the green then onwards to the corner at the bottom of the road often leaving a lot of stone across the road on the bend. It should collect in the pond on the opposite side of the road to the drain. Unfortunately the pond is not looked after and the outlet becomes clogged, the water doesn't flow so all the debris just chokes the drain and the pipe beneath the road. After prompting it sometimes is cleared - but only the drain, not the pipe. On these occasions it blocks rapidly so all the effort is a bit of a waste of time. However, last time it was cleared, a good job was done with the clearing of the exit point into the pond (so called) with the result that it took much longer to clog up again. The time has come to repeat the job. Clear the drain all the way to the pond and try to clear some of the pond to allow the water to flow into it.