Yeah definitely something not right about the connection. Web pages are very sluggish, some don't even load at all (speedtest.net). However Fluidone have agreed not to bill me until this is fixed. They said they've had this issue before a few times on FoD connections as BT Wholesale configure this slightly different from native FTTP (despite both being technically the same after installation) such as different packet sizes.
Well that really sucks, I know we had issues with BT at the start to do with our FTTP installation, but due to the issues being their end and also having proof of this along with certain emails being sent we got a rather very nice compo for all the hassle, which was nice
I hope you get this resolved very soon and get to use the whole connection, it has made a huge difference here