Split Commute: 2 bikes or a folding bike

I’ve got a two mile trip to the station, then a six mile trip from Kings Cross to my office.

Planing to start doing the non-train bits by bike now that I don’t have to drop the kids off at nursery on the way.

Can’t work out if I’d be better using one folding bike for the whole journey or parking a dedicated bike at Kings Cross.

Folding:

– Quicker on to the train at each end
– More secure
– Can maintain at home
– Have to handle on the train
– Slower and less fun on the road

Dedicated Bike at Kings Cross:

– Significantly less secure (have secure parking at work but not so confident about Kings Cross)
– Slower on to the train as need to lock up
– Need to maintain at work most of the time
– Quicker and more fun on the road

Any got any experience of this or recommendations?

Thanks in advance.