May I ask how you are feeding them sugar syrup. Or rather what equipment you use.
I am south of you by maybe 70 miles as crow flies. Bees are flying but not so many. Queen was laying up to 7 days ago. Bees collecting pollen. Mine still taking sugar but I am using an ashworth feeder so it gets some heat from the bees. The feeding is reducing. I have fondant ready but not on.
I have just looked at your day and night temps and the rain forecast. They may fly at dry intervals but that’s not so often. Later in week odds are good. Sugar syrup is as Dawn says although that’s advised as 1kg sugar (or 1 bag) to 600 ml water in U.K. terms.
I will continue to leave sugar on until later in October. But my sugar is inside the hive and hive now as from last Wednesday has both roof insulation in and an external foil insulation wrap. So as you are north midlands you should be at same stage.
Last thing I will do before total winter prep complete is add fondant right on top of frames, check and if necessary clean off mesh floor (which is removable without disturbing or lifting brood boxes) and fit foul weather Perspex shield above entrance.
My hive is a standard brood and a super or shallow box. I put the fondant on top of the top box not between the two boxes. I use a very shallow eke. I cut the bag fully open on one side but leave plastic on top. I cannot tell you if this is the best practice. But at the moment it’s what I do. It does mean I can remove roof and crown board and do a very very quick check in January.