Same situation here. I’m due to change in Feb 2019 - so need to order in December.
My Jag XF has jumped a few bands in BIK under new WLTP rules, so its no longer an option.
I’m awaiting release date of the new Lexus ES hybrid (basically a Camry with a Lexus make over )
Predictions are that it should be around 110g/km and no 4% diesel surcharge.
It arrives in UK Q1 2019. So for me it makes it a possible (if boring) option...
The alternatives are the smaller Lexus IS300h - had one before - nice but a little uninspiring.
Mitsubishi PHEV - but I’m not convinced by build quality - other owners I know have not been impressed.
Or or suck it up & take a Mercedes E220d or Volvo S90 D4 - both around 122g/km.
...but I’d have to pay >£300/month for those
Any other suggestions very welcome.
z