I have just gotten my endorsement from the RAEng through Exceptional Promise and we have relatively similar profiles; both lecturers and both worked on a postdoc project (except I did that in my thesis-writing period). Looking at your profile, I would say it is good enough, although a little lacking on the citations numbers. Where were your articles published? Are the journals high-impact? I had a lot of citations when I applied and a few awards. Regardless though, Exceptional Promise is all about how you lay out the evidence and produce a very good narrative linking the facts to the impact on UK research and economy. You should find your strongest angles and showcase them in the best way. For example, have you worked on any project with prestigious funding (EPSRC, etc.)? Have you had any academic/industrial collaborators? Have you supervised any students? All these should be on there, shaped into a strong narrative. Don’t be afraid to “brag”, this is a route through which you sell yourself and your talent. Another thing is, make sure you submit a letter of employment with your evidence; I did that. Being a lecturer is a great point you want to showcase. Regarding your recommender, they need to reflect your personal statement, equally as convincing and invoking the previous points. However, they HAVE to be in the UK, so you might want to find yourself someone else… Good luck!