You're both quite laid back here ;) One of my mates who went up and saw this damage on Sunday has proclaimed that if he ever achieves world domination, the skulls of the perpetrators will adorn poles at the entrance to the carpark.
Ha ha! Never mind that, as MES (backed by the Inspirals) pointed out when he visited Paviland "No one ever said it was gonna be easy/A pain to tease me, the barrier's broken/Climbing aboard on a white knuckle ride/Churns my insides and the wheels are in motion". Which I think is about right.
Yes, it is sort of underwhelming but I'm impressed by the manner it has been conserved and the fact it is a lowland barrow on/near some rare ancient fen land. So much had been destroyed in the mid/late 20th century by the M4 construction and housing estates.