I used to think that a fixed ELT would be generally useless for Europe (where one can often walk to Tescos) but there have been a few accidents lately where the S&R services took many hours to find the wreckage, and IMHO looking at pics of the wreckage it was not at all definite that all onboard were killed on impact (even though all were dead when found).
Given that the boys at the Belgrano have spent years insisting that fixed ELTs were removed because of the risk of alarms being set off by heavy landings, its a bit rich for them to start insisting on a fixed installation now.
Personally if I go down in the oggin, I want the alert fixed to me (sod the passengers and aircraft)