Thank you for your replies.
I think I need to explain little more.
- this wasn't a business trip but aviation enthusiast weekend. Only business related matter was to be at HEL monday morning.
- the proposed route was HEL-BUD (Getjet), BUD-BSL (Wizz), ZRH-MAD (LX A220), MAD-LHR (try Dali lounge and get some OW segments), LHR-HEL (to home).
- done this kind of trips many times before and well aware about risks.
- posted here because BA ticket and to ask if there are anymore OW separate ticket policy (got ansver very quickly, thank you very much)
- the reply after IB was bit emotional. Shouldn't have been submit
Ps. Sorry my bad english. My co-flyer is much better in english and he edited my writings to english yesterday.