Locally compact groups built up from p-adic Lie groups, for p in a given   set of primes
  We analyze the structure of locally compact groups which can be built up from p-adic Lie groups, for p in a given set of primes. In particular, we calculate the scale function and determine tidy subgroups for such groups, and use them to recover the primes needed to build up the group. 
Helge Glockner