There are no training circuits at Biggin any more.
Which iz wot I sed 
You wrote
Hence Biggin booted out the schools.
Which isn’t correct. EFG are still there, but have to do circuits elsewhere.
Interesting. Biggin “booted out all the schools” (all over the UK social media) but then a deal was done to stay but do circuits elsewhere. So Biggin gets the best of both worlds – gets most of their money, but no circuits
Good ol’ Social Media 
So what does it mean practically ? Do some staff stay late if you come after hours with no surcharge ? Or can you exit/enter the airfield by yourself ?
Looking at their fees: are Handling and/or “Security Airside Escort” mandatory? If not, £41+8 does seem rather attractive for international visitors.
Transport towards the west seems a pain… I have friends in Reading, public transport means a bus and two trains, super slow. I guess Uber is the only reasonable alternative?
Berto wrote:
Reading, public transport means a bus and two trains,
There are likely much better airfields for reading.
I know White Waltham EGLM is near a train station that has frequent and direct trains to reading, but I imagine it might also be worth checking other airfields around it.
They are unlikely to have night / instrument approaches though.
Noe wrote:
There are likely much better airfields for reading.
Indeed there are – Blackbushe would be my favourite, but sadly it closes at 1800 as do most small fields in the area. I’m trying to get a day’s work in (at least till 1400), head over to my hangar and be airborne by 1530 CET. With a C172, 3h30 isn’t enough.
Farnborough… well, let’s not even discuss that!
So EGKB being open till 2300 sounds very good… still curious about those fees.
FWIW, I think you can land at White Waltham out of hours. At least when I was based there (in club planes), I never had an issue with it.
