They will not be able to add this. It is US domiciled, not a UCITS ETF, and so cannot be sold in Europe. @kali makes an interesting comment here.
You could however ask for iShares IUFS or Invesco XLFS or db x-trackers XDWF.
Each is ICITS and comes in a USD and GBP currency version. I suggest you research them on justeft.com and report back to us on which of the 3 seems better, and why. They will differ in charges and size of fund and perhaps a bit on past performance. I personally like iShares, but the other companies may have something competitive.