http://www.etihadairways.com/sites/e...howtoearn.aspx

I've checked the mileage LHR-CPT and the regular miles awarded for this route are:

8081/16162 miles in economy (one way/return)
12122/24243 miles in business (one way/return)
16162/32324 miles in first (one way/return)

So in the double and triple offer that is

Business 24243 x 2 = 48,486
First 32324 x 3 = 96972

http://www.etihadairways.com/sites/E...ntheworld.aspx

That's per person, and according to their website I should also accrue 100% of my missus' miles so that's a total of 193,944

http://www.etihadairways.com/sites/e...tBenefits.aspx