He was released from Spurs in April 2005 and signed for Aldershot Town until the end of the 2004–05 season. Slabber made a total of four appearances, including two in Aldershot's defeat on aggregate in the Conference National play-off semi-finals to Carlisle United, where he scored in the 90th minute of the second-leg. Slabber then signed for Grays Athletic on a free transfer in May 2005, ready for the start of the 2005–06 season. He went on to make 40 Conference National appearances scoring 13 goals over two seasons.