First, speed tests that ask for everybody to do them are fraught with being overloaded, the speed test servers have a limited bandwidth as does everything so overload is inevitable. it is best to do tests very late in the evening or early morning to get a good idea of your connection speed without the congestion on the internet loading your results.
We also not from the BBC maps there are no results from our service within our coverage area, we can only assume that people only do tests and post results generally if they are unhappy with what they have.
There are some in areas we cover and areas we will cover later this year with very dissapointing results on ADSL, we would suggest they contact us for an upgrade !