The likelihood of that changing much is unlikely, the Russia argument isn't really there, we do get a fair wedge of petrol from them though.
This, redacted, paper from 2014 by UK Gov gives estimates of potential supplies of gas, ranging from 1.1% of consumption to 89% of current consumption, so they didn't really know how much gas they really do have and even if their optimistic results are in place, they would need to drill 1100 wells a year (they also state this is highly unlikely).
ONS report from 2015 shows we don't heavily rely on Russia for hydro carbons and not at all for gas
https://www.ons.gov.uk/economy/environmentalaccounts/articles/ukenergyhowmuchwhattypeandwherefrom/2016-08-15
The likelihood of that changing much is unlikely, the Russia argument isn't really there, we do get a fair wedge of petrol from them though.
This, redacted, paper from 2014 by UK Gov gives estimates of potential supplies of gas, ranging from 1.1% of consumption to 89% of current consumption, so they didn't really know how much gas they really do have and even if their optimistic results are in place, they would need to drill 1100 wells a year (they also state this is highly unlikely).
https://assets.publishing.service.gov.uk/government/uploads/system/uploads/attachment_data/file/337654/RFI6751_Draft_Shale_Gas_Rural_economy_impact_report.pdf
This article here shows the effect of shale gas on the UK economy would be tiny.
https://www.sciencedirect.com/science/article/pii/S0306261918301764
In my opinion, the folk that will benefit the most are those that own, drill and frack these wells.
This is leaving out the potential ecological damage and the eyesore of thousands of wells having to be drilled to keep producing.