With the flap closed no doubt. With the cheap sockets if you open the flap
it is
nore waterproof than a normal internal socket. That's why I recommended
the MK
Masterseal range, they're IP rating is the same when a plug is inserted as
the
lid seals the plug and socket and the flex inside.

True, but the cheap Clipsal one will maintain rating if you use their
matching plug. And it will maintain IP66, rather than IP56, not that it
makes any difference as it is the second number that is important for this
application.

As very little equipment will be used in the rain, it is no hardship to
replace the plug of the odd item with a matching IP rated industrial one,
but most people won't need to. I, for one, am perfectly happy waiting for
the rain to stop before mowing the lawn.

Christian.