maintain routing, speed and level for 7 minutes, then direct to the next waypoint and according to the current fpl to destination,
(Assuming radar) No, maintain speed and level for 7 minutes -- the routing should be according to flight plan from the outset. If being radar vectored, proceed directly to rejoin the flight planned route no later than the next significant point. In the UK (only), you keep the vector for 3 mins.
And letīs suppose the MORAs ahead are ABOVE FL100and/or fuel would not be sufficient at that Flight Level. What then?
After the 7 mins, you climb in accordance with the flight plan. If the minimum altitudes are lower than your current level, you climb to the minimum altitude even before the end of the 7 mins.
You cannot climb/descend on your own accord with lostcomm, can you? Except when reaching the IAF, you are supposed to descend in the holding there, right (unless specific lost comm procedure at airport is overruling that).
According to the ICAO procedure, yes, you maintain cruising latitude to the IAF. In the UK only, you arrange the flight to arrive over the IAF at the highest notified Minimum Sector Altitude taking account of en-route terrain clearance requirements. That's a significant difference.