I took a ride into town to see how work is progressing.
As you can see, the tracks to platform 2 (old number) have been lifted and the only access to that platform is by the temporary crossover from platform 1 (old number). Construction of the extension and widening of the platform 2 and 3 (old numbers) island is well under way and has already obliterated the original access to platform 2.
The new edge for platform 4 (old number) is well on it way to completion, although there's a gap at the concourse end:
Meanwhile, on the other side of the station an array of on-track machinery is parked in platforms 8 and 9 (new numbers):
Finally, on the concourse work on the former Burger King and Coopers bar is progressing. I believe this is to become the Virgin customer service office and first class lounge: