As so many have said on the forum previously, the only devices known to give truthful results on the Disco 2 are Nanocom, Hawkeye or Lynx for the DIY market. The Testbook T4 is the kit used by the main dealer.
There are one or two which might be able to read some of the engine ECU data but it's unlikely that they will read any of the more specialised ECUs such as SLABS.
When I bought my Disco I had already done my research and allocated enough to buy a Nanocom at the same time.
Your best bet is to find somebody who might be able to help. A visit to the main dealer is going to cost at least a third of the cost of say, a Hawkeye.