Got this from the NOTAMS
CONSTRUCTION OF NEW CHANGI EAST RUNWAY 01/19 LOCATED 1,800M EAST OF RUNWAY 02R/20L COMPLETED. OPERATIONAL TRIALS WILL BE CONDUCTED ON RUNWAY 01/19 BETWEEN 2330/0100 ON 5/6 TO 7/8, 9/10, 11/12 TO 13/14 APRIL. THE USE OF RUNWAY 01/19 IS SOLELY FOR THE REPUBLIC OF SINGAPORE AIRFORCE. 04 APR 09:32 UNTIL 14 APR 23:59
the thread can be found
here.
CAAS's AIP (with diagrams & layouts) can be found
here.
effective length of runway is 2,750m long.
heard there's no more go around right on 02R, must go left.
aerodrome fire & rescue svcs up to CAT 4.
the runway is built on reclaimed land & is exclusively for RSAF use only.
basically a new airport (new ICAO of its own) with its own apron and equipped with ILS.