Re: englishmen in islamabad
If you are interested in going on a holiday with your wife to understand the culture & people.
I would suggest you go and stay with a pakistani family there, you could advertise for home stay and offer to pay say USD 50 to 100 per day). Check up at the local mosques in England. See if there are any advice available there. Sometimes some Guppies here may offer a helping hand.
Alternatively - only stay in 5 star hotels (USD 100 to 250 per night), its not safe staying in ordinary hotels. (my advice is based on my experience in India, but I am sure the same applies in Pakistan)