I'm flying Emirates from UK to Brisbane via Dubai where I change planes - the first time I have had to change. I have 1 hour 50 mins to change, is this going to be a struggle? Arrive 6.50 am, leave 8.40am. I've heard horror stories of long queues etc.

Excuse my naivete but I'm unsure whether I have to pass security again on arrival at Dubai - bearing in mind I've passed it to board the first plane it doesn't seem to make sense.

And can I electronically check in and choose seats for both flights before departure?

Not sure what type of 777 it is, but will study the seat plans - though my wife says she doesn't like the bulkhead seats because of the wall even though I understand they have more legroom.

Any advice welcome, thanks