Well thats what i was told by sky Mr Saffron and skys website says that my line should hold anything between 2.6 and 7mb so who should i believe on this
An estimate is still only an estimate; particularly this wild one. The only thing you can believe is your actual reported attenuation.
Make sure you do any router reboots in daylight hours and take stats immediately.
What ADSL Mode is your router running at, ADSL/G.DMT, ADSL2/G992.3 or ADSL2+/G992.5? Can you tell? What router?
You may be better switching it to ADSL2/G992.3.
1999: Freeserve 48K Dial-Up => 2005: Wanadoo 1 Meg BB => 2007: Orange 2 Meg BB => 2008: Orange 8 Meg LLU => 2010: Orange 16 Meg LLU => 2011: Orange 19 Meg WBC