CAA May provisional stats are out.
Assuming the frequencies are those announced in the respective Cityjet route-launch press releases, and assuming no cancellations, I calculate:
Cardiff-Edinburgh: 4577 pax, 7900 seats, 58% LF
Cardiff-Glasgow: 3191 pax, 6300 seats, 51% LF
Cambridge-Dublin: 444 pax, 3500 seats, 13% LF
Cambridge-Amsterdam: 346 pax, 3500 seats, 10% LF
(Cambridge routes started on 12 May)
The airline has done its level best to minimise Cambridge load factors by launching the flights with two weeks notice and with no codeshares in sight. It will be interesting to see the results of a full month of operation (I assume they'll keep the routes going at least that long).