Your images shows the expensive BT 900Mb price includes Halo3+ ,whereas the cheaper BT 900Mb option has no Halo add on at all ,
Halo3+ isn’t free , its benefits are mainly whole home WiFi and an unbreakable connection ‘guarantee’ , so WiFi extenders in your home and a mobile 4G back up if the landline fails as well as (as far as I recall) some other benefits like additional mobile data if you have BT mobile and a home visit to check your equipment is set up optimally …..many seem to regret taking Halo as it proves to be an unnecessary expense, perhaps some take it and are happy with it , but you can’t compare two 900Mb services from the same provider and not take the Halo cost into account.
Using BT figures , they somehow calculate the total Halo benefits as being worth around £500 a year (their figures not mine ) so that is £41 a month , the price difference on your image is around £28 , so the argument is you are actually getting a discount by taking these benefits as a Halo add on , I’m certainly not saying it’s great value BTW , my view is the opposite, personally I’d never take Halo if it nearly doubles the basic price
