I've ordered a copy by Dever and Ferguson.
I'm in a free church of England church so where would my church have gotten it's practices from?
The pastor is a Godly man who would want to do right by God if presented with biblical instruction about an issue but would a free church of England church adopt presbyterian practices? Maybe in some areas.
To judge from briefly perusing the internet, Free Church of England is a small denomination of around 20 congregations. The raw data comes mostly from Wikipedia (I don't recommend the source as fully reliable, but it is handy).
Located mostly in the UK, FCOE congregations represent a breakaway group from the mainline Church of England about 180yrs ago, in 1844. The formation is said to derive from a reaction to the influence of the Oxford Movement and the reintroduction of a variety of Romish particularities, a potent challenge to the general Protestant character of the state church at the time.
FCOE appears to maintain a "low-church" liturgy based on the Book of Common Prayer. I interpret this to mean their practices derive from the settlement of the state church in the post-Reformation period. Their structure is episcopal, so governance of the church follows that historic model; it's a model that was held over from the pre-Reformation days of union with Rome, with the monarch of the realm replacing the Roman pope as earthly head of the church. In practice, the state church regards the Archbishop of Canterbury as England's top clergyman. FCOE maintains its own bishops, but apparently accepts COE recognition of its clergy (since 2013). I cannot tell from the available information if FCOE clergy regard the national Archbishop as occupying any kind of ecclesiastical position, with or without actual authority.
In simple terms, as far as church organization goes the FCOE and Presbyterianism are distinct. The former regards organization of the church as a matter of prudence and history, a pragmatic approach; whereas strict Presbyterianism regards church organization as matter of divine right, i.e. the structure of the church is predetermined by the biblical data, and is non-negotiable.
Where Presbyterians and the FCOE are similar is in the overlap of the Reformation doctrines found in the historic confessional documents of both branches. Presbyterians rejected the uniformity demanded by prayer book services. A low-church Anglican service is certainly a lot more comfortable to the average committed Presbyterian than any high-church liturgy. Some Presbyterian churches today have adopted certain practices from the BCP, for instance the introduction of various unison prayer readings (typically confession of sin). A move to such practices typically makes a "high church Presbyterian," so there's a kind of curious common ground there with low-church Anglican. For a "low church Presbyterian," such a move (adoption of Anglican practices) tends to look like the beginnings of a slippery slope.
Hopefully, you can see there are affinities between low-church Anglicans and Presbyterians in practice, although there are clearly differences as well. Those of either tradition who value the Bible, confess its perspicuity, and reverence its authority, and who retain commitment to the historic theology of their respective historic, confessional documents will find considerable common ground in comparable articles of faith. Yet, in the end, the more each side values its own tradition, the less likely a representative will be to adopt the other's practices.
