ok I just phoned Nildram up at the nice (quite laid back) guy gave me the below figures, based on two ADSL lines bonded together to get me a 1mb down and 512k up.
1. I would need 2 BT lines, one per ADSL line (more if you bond more ADSL packages)
2. Two dsl500 Nildram packages at £25.52 +VAT per month
3. Two £50 account setup charges
4. One off payment of £35 to bond them together
5. plus an additional £10 per month to have the bonded account.
My maths tells me for a 1MB/512K ADSL line it would cost:
£135 setup
£70 per month
and the cost of two BT lines?

when compared my 1MB/256K NTL cable line costs me £37.99 pm is that upload really worth the cost and hassle!