I have fibre the one with a theoretical speeds up to 300 mbps. The house is a new build and I have not until recently looked at the speeds I'm getting. They vary from 45 mbps to 100 mbps via wireless.
I did a speed test via the BT website and they confirmed 300 mbps to my modem was recorded. So something is going wrong my end of things. A friend said that you should not use cat5 cables which came with the router as they can only handle up to mbps but I'm not so sure that right.
I would be very grateful for some ideas of what to check / what the problem could be.