Fibre Speed of 40 Mbps is this correct?

[#1]

When I first signed up about a year ago I was offered 76 Mbps, I remember I wsa getting close to this.  Now I'm getting about 40 Mbps
I tried to call but was on hold for 25 mins so gave up.  Plusnet, please help me check my line at your end - ticket #82671828
http://www.thinkbroadband.com/speedtest.html
42.43 Mbps
http://www.mybroadbandspeed.co.uk/
41.90 Mbps
http://www.speedtest.btwholesale.com/
Download speedachieved during the test was - 41.65 Mbps
For your connection, the acceptable range of speedsis 40 Mbps-77.44 Mbps .
Additional Information:
IP Profile for your line is - 77.44 Mbps

I am about 0.6m from my FTTC

[#2]

I can see that you've started the Faults Troubleshooter, would you be able to complete this at http://faults.plus.net so our Faults Team can take a look for you?