Just rang myself after watching the report on BBC News 24, which the beeb are saying "self contained gas cartridges" have been banned (no mention of springers, pcp, co2, pump-ups etc...).
In my mind a self contained gas cart is a co2 bulb???
The lass who answered the phone said she never heard of TAC's as has confirmed she will pass on the CORRECT info asap.
Also read the above link to the beeb website which is now saying 90% of the banned air guns haven't yet been accounted for.