Don't expect too much more even if you are able to order VDSL2. I am 3300m from my local FTTC cabinet and get between 5.6Mbps and 7.0Mbps down, 0.7Mbps to 0.9Mbps up despite being on the 40/2 package. There is nothing you can do about the distance.
Its stupid really. it could be 2040 by the time i can get fibre in my area. By that time virgin will have laid all there cables for the UK.
Have you considered mobile broadband? There are some data-only tariffs of around 100Gb/month. You would have to calculate your current usage (most routers will tell you what has been used) and then allow a decent amount over that.
I did think about mobile but I am in a poor signal area too. It would require a rooftop antenna to get a good connection. It is possible that mobile broadband is what those of us well under the USO will end up being offered.