"...this first of two volumes will comprise of two Blu-Rays with English and Japanese audio with English subtitles, packaged in a limited edition slipcase and with bonus content including a forty-page booklet and extras never previously before seen in the UK such as "Ein's Summer Holiday"."
Unless more than one English dub already exists, I assume it will be the same as every other English release other than the actual audio encoding. I doubt a new dub will be included in the blu-ray, especially as the English dub was apparently very popular and Anime LTD only seem to be using pre-existing materials.
Although it clearly states in the description of this product page that its Japanese Language and English Subtitles, the exact same boxset on Z@vvi does state "Dubbing Languages: English". So I would say yes it does
This (Amazon) is however the cheapest price on the current market.