tony w wrote:
Well, I re-seeded the lawn yesterday, did it properly, added some
compost as a light overlay, and the heavens opened this evening and
washed most of the seed away! I now have nice little 'battle lines' of
compost at various stages on the back garden, and am not hopeful that
much of the seed will sprout.

All that hard work for nothing...... and it was looking pretty good,
kept it all wet, now I don't know when I can start again as storms are
forecast for pretty much the whole of the next week......

Been there, done that. My sister has been helping me clean up
my yard and the last seed that was put down was followed by
very heavy rains within about 6 hours. Looks like 75% of the
seed was washed away based upon what came up.

One thing that works well to cover new seed is peat moss.
It will stay wet for quite awhile, so you do not have to
water constantly.