Lewis and Gigha

I noticed a couple of MOD Police 8 person jet-ribs at Port Edgar last night, and today there were two more (see extras).  Two MOD Police Island class patrol boats have appeared too, on a break from their usual duty at HMNB Clyde (protecting nuclear submarines).  

Not sure what's brought such a show of force from the MOD Police to the Forth, but I wonder if it is to do with HMS Queen Elizabeth coming into Dry Dock in Rosyth, which this BBC article suggests could be happening in the next few days.