Just had the engineers out - ubrs is oversubscribed 99% utilisation - nothing they can do.
Has been escalated, but they weren't holding out much hope of it being fixed anytime soon - person they phoned at the ubrs end of things jokingy advised them to tell me to get another provider.
Some folk would be jumping, but I'm actually glad to at least know the problem - on hold to retentions now , see if i can cut a deal for reduced price or 50mb or something