Well, my Math is slightly different. 112p per share. ADR is 1 for 10. So, 1120p per ADR @ 1.55 GBP/USD, you get about 17.5 USD per ADR.
Reference for the 112p is:
We intend to return all of the Verizon shares and US$23.9 billion of cash to Vodafone shareholders (the “Return of Value”) totalling US$84.0 billion (£54.3 billion), equivalent to 112p per share. (All of the exact finals amounts will depend on the relevant Verizon share price and the dollar exchange rate on completion.)