The general rt discipline in FIR'S is not as good as it good be, the standard of initial calls has been so poor that the caa have issued an AIC 73/2001 (yellow58) 28 sep 2001 that highlights the point. The following is a link to the page.
Yellow 58 RTF Discipline 
During a recent visit to EGNX during low viz the RT phrases Call rolling and Call Airbourne were both used by controllers everyday, this supports others postings about improving situational awareness.
However this is sometimes only possible at quieter airfields, some operators use a visual check of the approach and the TCAS on every departure, low viz or not.
Comments anyone including Flange's !!
[ 17 October 2001: Message edited by: fadec_primary_channel ]