The inevitable fiasco approaches
As with everything that is Public Sector there are so many constraints around what you can and cannot do in the tendering process as well as the rules around the actual suppliers the entire process is a farce. It will end up costing more for a worse service BUT the pen pushes will be able to sleep easily at night knowing that every box has a tick in it.
This is not the fault of the Police (or substitute any other public body) but rather the obsession with frameworks and endless regulation that is supposed to make procurement simpler and cheaper. At the end of the day the only winners are the handful of big resellers, out sourcing companies and consultants. The problem is that it is the in the interests of the suppliers to have these frameworks as they effectively make the buyer blind to pricing.