Currently the bathroom has a PDL RCD powerpoint installed. I have checked the circuit and find that the wash machine is on the same circuit as the bathroom RCD powerpoint, but it's on the upper stream, actually the wash machine is on the 1st powerpoint. Please forgive my terminology.

Since the fuse box is the old style thus there is no RCD on the panel, can I relocate the RCD powerpoint from the bathroom to the wash machine?  So it can protect both the wash machine and the bathroom, and some others in between. The capacity of the circuit is 15A which is lower than PDL RCD's 20A. 

I think the rule says you have to have RCD protected powerpoint in the bathroom.
But does it specify where exactly the RCD device should be located? 

Thanks guys.