It solves it for a few days, but of course, we can't keep turning the electricity to the downstairs on and off once a week.
Again just because its in a locked room does not mean there are no wired ports around the house, etc. Stating its in a locked room, does not mean your not wired too it is all I am trying to say. When I asked if your wired or not, stating you don't have access to the router does not rule out a wired connection.
So your saying flipping the breaker solved the slowness issue? There you go then, you have your work around. Have your landlord contact the isp to fix the problem.. Not sure what help you expect? Its not your router, your not the name on the contract with the ISP, etc. There is really not much you can do than to complain to your landlord or move
I posted in hope there was a setting on the router that could have been causing this but if not, no worries, I'll keep moaning to the letting agents (it's what you have to do to get them to do anything).