Ok so I'm not sure that this is a deal as such but I rang to complain of slow speeds to Orange cust support on 07973100150.
I was receiving 2mb on an 8mb package 'home select', and my line can support 5mb. I was thinking of getting a MAC but was transferred to tech support. They advised me that they are aware of the problem and is due to them testing 20mb lines since March.
I was advised to wait and on the 21st October they are rolling out 20mb and offering it as a free upgrade to existing customers so you still pay the same rate. However it will be a new contract.
If you have a phone contract with them then you will get 20mb with unlimited usage for £9.79/month or £19.57/month for broadband only.
Seems a good deal to me but I await the cold votes for no conformation and the Orange broadband haters.
Probably best to call them yourself to confirm the deal.