On 27th Jan, MoD stated,
Trials in the Tornado GR4 aircraft have revealed that modifications are required to existing aircraft hardware and software in order to ensure compatibility with the Honeywell Traffic Alert and Collision Avoidance System II (TCAS II). Work is continuing to resolve these issues and once further trials and testing has been completed we will be in a better position to determine when the full capability will be available. The Ministry of Defence is committed to obtaining early beneficial use of TCAS II and is embodying the system in as many Tornado GR4 aircraft as possible to operate, initially, in Traffic Advisory mode.
Seems as though there is an integration problem, reminiscent of the Tornado/Patriot issue back in 2003. Let's get it right this time (BAE Systems have only had the contract for two years). We do not want the CWS problem to be made worse by the "It worked OK on the bench, Chief, so it must be OK in the aircraft" approach.
DV