Halifax has now come back to me stating they will honor this as i was not informed as to whats happening.
I will still have to go onto the new rate of 6.39 but will rebate me the difference as a cash lump sum. Cant argue with that really.
Only problem is that this is still only valid until 31st Oct 07 as with the original product.
Having spoken to the developers, it will be due for completion around end of this month but stating more than likely running into early Nov.
Bearing this in mind i am now preparing myself for actually taking out a new higher rate! Having working out some sums it may well be cheaper overall if I now switch using a broker, even taking into account of the non refundable valuation fee paid to Halifax.
Does any know if Halifax or banks will match offers to keep the business?