The catalogue number is actually correct. This was a promo I received from Jinx UK where the A side and B side were made up of two different mark norman releases. The first one "tell me" is actually TLSP 003 (Tri Lamb Special 003) and the B side Overkill is on Silver Premium (catalougue number SP-005). As both releases are available on two separate labels but Jinx UK released them together...with no Jinx UK catalogue number. Confusing as that is that actually is the truth. That is why the catalogue is inconsistant.