If notching is the way forward here is a list of notches required here in the UK
(Notching is a means of preventing the power line adaptors from using ranges of frequencies as is currently the case on some of the amateur allocations)
All the following HF or short wave services are legal to listen to thus must be protected from harmful interference such as BPL!
1.810- 2.000 kHz
amateur top band.
2.300- 2.495 Shortwave
Broadcast 120 Meters
2.495- 2.505 Time Standard WWV
3.200- 3.400 Shortwave
Broadcast 90 Meters
3.500- 4.000 Amateur 80/75 Meters
3.900- 4.000 Shortwave
Broadcast 75 Meters
4.000- 4.000 Time Standard New WARC Allocation Region 3
4.750- 5.060 Shortwave
Broadcast 60 Meters
5.000- 5.000 Time Standard WWV
5.250- 5.450 Fixed Channel Amateur Radio NOV.
5.730- 6.295 Shortwave
Broadcast 49 Meters
7.000- 7.300 Amateur 40 Meters
6890- 7.600 Shortwave
Broadcast 41 Meters
7.335- 7.335 Time Standard CHU Canada
8.000- 8.000 Time Standard New WARC Allocation Region
9.250- 9.900 Shortwave
Broadcast 31 Meters
9.990- 10.000 RWM Time Standard WWV
10.100- 10.150 Amateur 30 Meters CW Only
11.500- 12.600 Shortwave
Broadcast 25 Meters
13.570- 13.870 Shortwave
Broadcast New WARC Allocation
14.000- 14.350 Amateur 20 Meters
15.000- 15.000 Time Standard WWV
15030- 15800 Shortwave
Broadcast 19 Meters
17.480- 17.900 Shortwave
Broadcast 17 Meters
18.068- 18.168 Amateur 17 Meters
18900- 19020 Shortwave
Broadcast 15 Meters
20.000- 20.000 Time Standard WWV
21.000- 21.450 Amateur 15 Meters
21.450- 21.850 Shortwave
Broadcast 13 Meters
24.890- 24.990 Amateur 12 Meters
25.600- 26.100 Shortwave
Broadcast 11 Meters
26.965- 27.405 CB CEPT
27.60125- 27.99125 CB UK Allocation.
28.000- 29.700 Amateur 10 Meters
There are also a number of spot frequencies carrying weather and navigation broadcasts that would need protecting from this harmful interference! If these are not known they can be provided on request.
The above information is supported by Ofcom's guide found HERE
More detail for the broadcast allocations can be found HERE as well as many other sources.
Clearly UKQRM understands that all these notches would mean that the data speed would be greatly reduced! But then the Shortwave/HF spectrum is not unused so using this allocation was always going to lead to conflict!
There are many ways to set up a wireless network for data and streaming video maybe these options are they way forward?