WW 1 Naval Censors 1B30 and 5C71

[Michael Gould]

Censor 1B30 has been reported with BS Sub Lt RNR. There are only two officers who fit this, both acting lieutenants, on Lord Nelson or Driel Castle. My own frank does not gel with either ship. Does anyone have an example with a readable frank (preferably with date)?
I have only one report for 5C71 and the middle letter of the frank is unclear (it is probably fgm). Does anyone have a second example with a different frank?
Many thanks.
Michael Gould