Pretty good. There is a mobile mast roughly 300 yards from us.
I noticed you mentioned vodaphone. I've done a quick search and they have guaranteed min 25mbps speed and the price is £15 cheaper than we are paying at the moment with no set up fees etc..
Agree OP should look at the range of options, hence knowing what is important to them (latency? Bandwidth? Download caps?) is key.
Mobile data might be an option, but unlikely if low latency (eg gaming) is their priority.....
In a variety of exchanges, Sky and other ISPs have a range of equipment in the exchange that they use to provide their networks. Not all equipment is OR maintained. Plusnet and TTBs equipment is more likely to provide slower speeds etc
Unless this issue is OR here... ADSL is being phased out and might not be appropriate
I think the OP should consider 4G alternatives
Vodafone and H3G might be an idea... I get 60 on H3G down and 80 when I tested on Voda...
They now offer UNL packages...
Don't touch them owe me £500 since January 2019 make excuse after excuse. Seem they always have software problems sending money out. Keep saying they will call back or email nothing been chasing it now for 6 mths the phone staff always have the same banter we will chase it up and get back to you then nothing!