I reckon there is a small chance there will still be units at big Apple stores after the queues have got theirs. I'm about 30 minutes away from Regent St so mentally prepared to head up there at about 6pm. We will have had word whether they have sold out or not.
I work in Piccadilly and finish work at 5.30pm. Was planning to head over to Regent Street too and join the MASSIVE queue. Here's hoping that you are right and I will get one! I'm not holding out too much hope though. Placed an order online last night at 1am as a backup option.