a BOTE calc from your supplyed No.s indicate that infact a
consistant absolute minimum
1.733 Mbit upload rate is required for the 50Mbit to be fully utilised.
as i said,
1.5Mbit upload rate isnt enough...

,call it a full 250 Kbit short
after overheads, at least...
OC if you want to help them justify keeping the lower upload rate ration for the highest price, you can be sure they will do it being VM after all
they already have
the UKs worst ration after all, weras they could massively profit from good PR if they moved that ratio fact to the other extream....
and as TD and others elsewere have said, thats not even allowing for browseing or
uploading files were ever
while maxing the 50Mbit download rate.
and forget gaming pings or hosting games for your mates etc at the same time,that will also slow or degrade your 50 Mbit download abilitys.
more upload rate is always a good thing,
even if you think you dont care about uploading...