Originally Posted by corporate-wage-slave

Dual citizenship is recognised by the UK government and it's quite OK to enter the UK on an Israeli passport without further explanation being given. In the unlikely event of the BF officer asking about it, then a full and honest answer is best, and having a passport in the US embassy for a visa sounds like a very good explanation to me.

It's not at all unusual. Until the e-gates came in there were many dual citizens who undusted their other passports if the non EEA queues looked shorter at primarily shorthaul airports like STN, LGW and LCY.