Here is a five minutes clip proudly presented by a gang of thugs that call themselves "London BDS". They titled this clip quite pompously:
BDS activists disrupted Israel Philharmonic Orchestra Proms Concert 5 times
Notice the reaction of the audience to their thuggish behavior.
Now your mission is to find Deborah Fink among the BDS gang.
Answer: no, you can't see her actually, but you can hear several times a sound akin to that of a big heavy door not oiled for quite some time or, possibly, that of a duck that is being slowly strangled by a boa-constrictor while being bitten from time to time by a dog. Check a sampler here.
More witness-produced details on the disturbance of the concert here and here.
34 minutes ago