Well we've had a day of it. We tried the new server/system out today under a live traffic load and it wasn't up to it, so it's been rolled back under cover for the night. Old server is back doing the work. Software balancing required. Not unlike quite a complex engine.
Those who used the site this afternoon will have noticed some glitches like non loading pages, etc.
We think we have just about tweaked the engine to take the traffic and will again try tomorrow.
Thanks for your patience.