Article on the MRA4 in this week's AW&ST.
Summary is that contract is for 9, there's haggling about converting the other 3 but the money has to be squeezed out of long term costs for the fleet. That, might, end up with enough funds to convert one or perhaps 2.
Handover to the RAF is due for the end of 2010 but the number due at that date has been reduced from 6 to 4.
They looked at using them to replace the R1s but decided the Rivet Joints were a better option.