The closure and diversion of P4/P12 buses was pre-planned, to tie in with the road resurfacing of that section of HOP. The bus diversions were intended to be 9:30 to 4pm only from last Friday, through to yesterday.
The water main burst seems to be over and above that resurfacing (caused by the heavy vehicles/digging???) which has thrown everything into chaos, though DH saw a P4 on Tuesday morning approx 8:30 stuck upto its axles in a hole with water gooshing everywhere, so that might have been an contributory factor too.
Tuesday evening was complete motor vehicle mayhem, with every road near that area solid. However, I did the school run this morning and, because of the closure planned to go through FH, but Stanstead Road was solid, so I thought I'd take a punt on the Brockley Rise/HOP route which was absolutely desterted and totally clear. Just shows that you just can't predict where the jam will be next.