You’re safe in that case, that’s a relief!
I had a look at the Gleaner website too, it looks like they are selling Shell fuels.
This AA link confirms that B7 is normal diesel.
New labels are set to appear on all petrol and diesel pumps by 1 September 2019 but the fuel you use is exactly the same. Petrol pumps will have E5 in a circle and diesel pumps will have B7 in a square.
www.theaa.com