'Should get' - implies the project has finished, when in fact they are only just starting.
You should be in line for some form of upgrade, but it may require you to change provider e.g. it could be a fixed wireless scheme that TalkTalk do not sel..
Looking back at your stats, can you confirm the price you pay for your broadband? Since it does not look like TalkTalk LLU, but rather their offnet product. The offnet product is renowned for poor speeds i.e. speed tests being a lot lower than the modems actual connection speed, and that is what you are seeing.
You might find changing to a provider like BT, PlusNet, Zen, IDNet, AAISP will improve your results. You won't connect any faster, but might get better use of the small amount of speed you have.