Exactly what they did when the SHAR was around, except delete the Shar and T8...from their current 'menu'.
They will be up and around the SW several times a day supporting RNSFC (D-School) and a few times per week for FOST.
From the RN website:-
NFSF(FW) is responsible for the Flying Standards of all Fixed Wing Aircraft (as opposed to Helicopters) operated by and for the Royal Navy, including Sea Harrier F/A 2 and T8, Hawk T1, Jetstream T2 and T3, Grob G115D2 and a variety of Historic Aircraft.
Professionally qualified pilots have their skills tested annually by standards to ensure their skills are still up to scratch. The Unit acts as agents for the Central Flying School (CFS) based at RAF Cranwell.
Two BAE Systems Hawk jet trainers are based at Yeovilton at the disposal of NFSF(FW). They are detached from their Parent Unit, the Fleet Requirements and Direction Unit (FRADU) at RNAS Culdrose.
Using the two Hawks, NFSF(FW) conducts Fast Jet Continuation Training, Fast Jet Familiarisation, conversion of Pilots from Helicopter to Fast Jet (Air 309 Course), and provides Radar Targets for the Sea Harrier F/A 2. The Unit flies a wide variety of Fleet Support tasks including Ship Attack for Flag Officer Sea Training (FOST) and Joint Maritime Contribution Exercises (JMC), Fighter Controller Training (called 'D' School) and Helicopter Pilot Fighter Affiliation.
NFSF(FW) is also responsible for Pilot conversions onto the Jetstream, Historic Aircraft as well as continuation training for Fast Jet Royal Navy Reserve (RNR) Pilots. RNR pilots normally fly airliners, but also fly for the Royal Navy for a few weeks every year.