I'm sorry to learn you are having an issue with your broadband connection.
Looking at your connection, there is a high peak time traffic fault in your area which is causing slow speeds. The reference number is F005050877 and has a review date of 6th December. As this is a review date it can be subject to change.
As you mentioned you achieve low speeds outside peak hours, can you completed speed tests through a wired connection and let us know the results please?
With the signal drop is this in regards to the wireless connection? If so, you can take a look at this guide to improve the connection > Getting the best WiFi.
i don't mean to sound arrogent but neither wifi or cable are consistent your hub is not good and i do not seem to be the only one to say this in fact no one i know in my area who has a hub 3 is happy . so why don't you just admit it and replace it or admit you can't sort it out and your system doesn't work. it drops all the time at least 3 times a day i am having to reboot it .