Upscaling should and can be done at the TA parent unit before starting, a letter will have been sent to RHQ and a copy is taken to the QM in advance, he can then issue the upscale. However if you have not done this, then the upscale was:
Extra combats, smock, trousers, jacket lightwieght x 1 set, extra T shirts x 2, thermal underware x 2, sealed respirator canisters x2, More socks and that was about it. It will depend on what you have already been issued and what is needed to "Upscale" you.