RSJ Beam calculation for opening in house wall

Seeking a UK-qualified structural engineer to perform RSJ calculations for a rear wall opening in a solid 225mm brick house. The load includes first-floor and loft-bearing beams; span ≈ 3.0m.

Detailed measurements will be supplied.

I need: structural calculations, recommended beam size(s), assessment of wall suitability, bearing details and specification adequate for building control submission.

Report must be authored by a UK-accredited engineer.