The new Type 31 building contract announced, more violence in Northern Ireland and Bolton gets the boot

This week the First Sea Lord is at DSEI as the MOD announce Babcock will build the new Type 31 frigates. Police chiefs in Northern Ireland say a bomb in Londonderry was built with the aim of killing police officers.  We talk to the Chair of the Police Federation of Northern Ireland Mark Lindsay. We are joined by Dr Karin Von Hippel, the Director General of RUSI to talk about the sacking of the US National Security Advisor John Bolton and Fawaz Gerges explains what it means for American foreign policy. Chris Ryan, the former SAS soldier turned author has a new book out called Black Ops.  It's firmly based on his knowledge of how the regiment operates, so what's life like as member of the elite unit in today's trouble times?  Follow us on Twitter @bfbssitrep