This is what BT considers acceptable for superfast infinity fibre broadband.
Download speedachieved during the test was - 26.9 Mbps
For your connection, the acceptable range of speedsis 19.48 Mbps-27.83 Mbps .
IP Profile for your line is - 27.83 Mbps
I understand where you are coming from but many people on this forum would kill for the speeds you have