"PIK/BHD in the 738 will be one mighty quick journey."
It certainly will be; indeed, PIK-BHD will only be 70 n.m. as the crow flies, so the flight time will be around 20 minutes. This route will also be FR's shortest, replacing PIK-LDY (93 n.m. as the crow flies). (FR's longest route is presently NRN-FUE, at 1654 n.m. as the crow flies.)
"I think Ryanair doing London - Beauvais will just be for the Rugby world cup."
That's correct.
STN-BVA: 14th Sept: 0625-0840 and 0630-0845
BVA-STN: 14th Sept: 0905-0920 and 0910-0925
STN-BVA: 15th Sept: 1210-1425 and 1425-1640
BVA-STN: 15th Sept: 1450-1505 and 1705-1725
LGW-BVA: 14th Sept: 1000-1215
BVA-LGW: 14th Sept: 1240-1255
LGW-BVA: 15th Sept: 1730-1845
BVA-LGW: 15th Sept: 1915-2035 (think 2035 is an error and should read 1935)