>> Interestingly speeds have since yesterday evening increased to around 4000 kbps and have kept up at that level today.
Thats interesting - because if anything, your speeds could have been lower last night.
There was a major outage over the weekend that knocked out some ISP's centrals. - This is the BTw MSO sent out which is aimed at the ISPs.
BT can confirm that, following significant damage by a third party to cables in a deep underground tunnel, a large number of customers in parts of East London are currently experiencing a loss of service.
The above had a knock-on effect of taking out some ISPs Centrals. I know that Plusnet were affected and they lost some of their centrals, one of which still wasnt back up by this evening... so if anything you'd expect speeds to be a bit slower until the problem is fully resolved.
>> I don't use p2p and my bandwidth is not high as I don't do alot of downloading.
You may be interested in the Value package @ £11.99 for 10GB. You can see how it performs to your existing package side by side
here. Select the relevant products from the drop down box. Value starts at £5.99 but thats only only market 3 exchanges - its £11.99 for a market 1 or 2 exchange, but its still a slight saving over what youre paying now.
Warning that if you change you will enter a new contract period. However its worth pushing in your ticket for either a free new router... or push further and categorically say that in view of the problems youve been having that you wish to be transferred without incurring a new contract period.
Alternatively depending on how much you do use, look at Newnet £10.72 for 1Gb or £12.67 for 3GB.