I think I am "knowledgable enough" to answer that.
MGB (UK product) in past has served our needs pretty well by able
to fulfill most of our fixed bridging needs up to MLC60:
section bridge - 5 bay bridge - 8m gap (short gap)
platoon bridge - 24 bay bridge - 22m gap (medium gap)
company bridge - 48 bay with LRS bridge - 42m gap (big gap)
However due to reduction of manpower and the new requirements to
build more bridges at a much reduced time, newer products need to
introduced. The current replacement are:
short gap - STB (Maded locally) up to MLC30 or MLC60 (in pairs
configuration)
medium gap - extended STB (MLC30) or Leguan VLB
(MLC70)(German)
big gap - Donnier Folding bridge MLC80(German)
One significant advantage is most of these require only a section
of man to build in less than 30mins. 