info of flights @ Stansted

Hello guys n gals.

Woundering if anyone could help me??

I was at Stansted this morning picking up my parents, I saw a couple of flights that were not Ryanair!!
Sadly could not get anywhere close to see any registrations 🙁

Mainly a Transavia 737 (HV5096) and CSA 737 (OK654)

And if anyone knows the two aircraft bearing a blue tail with OEM in gold on the fin.

Cheers
Dizzy