Cambridge notified club chiefs of his decision earlier today, less than 24 hours after they bowed out of the FA Vase. Rovers were beaten 3-0 by London Colney in the first round proper yesterday in the 19th and last game of Cambridges reign. He leaves the club sitting in the Thurlow Nunn League Premier Division relegation zone after having to completely rebuild his squad following a mass exodus of players during the summer. Cambridge said: The results weve had this season arent what a club like Godmanchester Rovers should be picking up. It has been beating me up inside and resigning just felt like the right thing to do. Maybe it is time for a different face and voice to come in. When I took the job, I was coming into a club which had finished second in the previous two seasons and wanted to challenge for promotion. But every player from last seasons squad eventually left and it meant I had to start all over again and build a completely new group. We have some good lads and strong characters at the club, but they just need one or two things to go right for them. Im sure they will keep improving and finish in mid-table. I wish everyone at the club all the best for the future and apologise that things havent worked out as well as I hoped they would. Godmanchester Rovers is a fantastic club and Im grateful to have had the opportunity to manage there. Cambridges number two John Bitten has also resigned. Former boss and director of football, Nev Nania, has been placed in temporary charge ahead of a visit of table-topping Mildenhall on Wednesday night. Club chairman Karly Hurst said: We would like to thank Ada for his time and professionalism in the last few months as first-team manager. We appreciate that this was never an easy role for him especially as he had to rebuild the whole squad, but we wish Ada all the very best for the future.