Spoke to BA sales this afternoon. The upshot of that is that there are no £1999 deals available any more, they have all been sold out. There are however a few seats left at slightly higher prices.
The entire month of October is completely sold out,standard fares and offer fares.
To summarise, the girl at the sales office in Newcastle upon Tyne told me that for the next 6 months, there are now only a handful of seats left.
You've gotta do it!!