A319 F/O reported failure of ELAC 1 and ELAC 2 during cruise so the flight crew elected to divert and make a precautionary landing.

Narrative

This event took place during a flight from ZZZZ destined for ZZZ1. The inbound crew had experienced an ELAC1 fault in cruise late in the flight which resolved to normal operations somewhere in the descent. I was deadheading in the cabin on the inbound flight and was advised of the ELAC issue at the gate where I took the place of the FO (First Officer) who operated the inbound flight. He was illegal for the leg back to ZZZ1 and took a seat in the cabin to deadhead back to ZZZ1. Maintenance was advised of the issue on the inbound flight and Mechanics came onboard to evaluate. No remaining problems were found and the aircraft was deemed safe for flight. Departure; climb and initial cruise at FL380 were normal until about two hours into the flight. First we got an ELAC1 pitch trim fault and automatic autopilot disconnect. There were no ECAM actions to perform and we reengaged the autopilot. While analyzing the effect of the failure we got an ELAC2 pitch trim fault and the autopilot disconnected once again. The Captain requested a descent from ZZZZ Center as we were no longer RVSM compliant and then he called the 1st FA (Flight Attendant) and requested the deadheading FO be sent to the cockpit. Having the extra crew member in the cockpit was very helpful as he assisted with the radios; systems research and a variety of other tasks. I was hand flying the descent to FL260 and then FL240 due to turbulence while the three of us discussed our options. Although the display said to use manual trim; the trim wheel was frozen in place and could not be adjusted. Control pressure in pitch was light and even though we had no pitch trim available; hand flying the aircraft was not difficult. At this point we were in alternate law and even though control was not difficult; hand flying the aircraft required constant adjustments and was significantly touchier than hand flying a fully functional aircraft. The Captain attempted to contact Maintenance but was unsuccessful. We decided the situation warranted [an alert] and since ZZZ2 appeared significantly closer we decided to divert. After further discussion of our frozen pitch trim we decided advising ATC was appropriate. En route to ZZZ2 we were given lengthy vectors around military airspace which was unexpected since we had requested priority handling. In the descent to ZZZ2 the pitch trim became usable again and the approach and landing were uneventful.