My Plusnet, ADSL reality is a d/l max 2.8 Mb (min 1.1 Mb), usually 2.5 Mb and u/l of a steady 1.0 Mb.
Parallel, Virgin 50 Mb, FTTH service now in place.
Over a recent 90 mins. period, speeds have been averaged, over 4 tests.
Download speeds: PN = 2.6 Mb, VM = 47.5 Mb.
(Upload speeds: PN = 1.0 Mb, VM = 3.3 Mb.)
[The PN speeds are single, wireless user, whereas VM speeds include a 2nd, Ethernet user; currently streaming Youtube videos.]
The moral of my story is that you get what you pay for. Also, I have found Plusnet customer services to be incredibly poor (mistakenly deactivated, for a full week, on 26th Feb., it took until 7th Apr. for my upload speed to be reinstated to uncapped).
Bonus: Since VM, 50 Mb was activated, I have found much less used cat litter in my corn flakes!