Currently the 345 aircraft is not scheduled to operate anywhere on Friday.
At the moment EK1 and EK3 are scheduled 77W services. These will have the SkyCruiser seats in F. If you want this seat you can also get it on the 772ER which is scheduled on the EK5 that day. All LGW flights on 30 Mar have older aircraft.
Finally, there is an outside chance that EK1 on 30 March could be operated by Emirates newer B77W's which will have the "suites" fitted in F class. A6-EBY would be the plane but no firm delivery date currently except to say it is late March.
Rgds
Emirates777