Wall Differential Movement Survey

I need a detailed survey and report on differential movement between two abutting brick walls. The primary issue is separation gaps in the corner. The house is circa 1870 terraced london with 9" solid double brick. One wall (original) forms the side of an extension to the rear of the main house, and was given extra support in accordance with the surveyers recomendations some 10 years ago. The hot summers appear to have caused that wall to separate from the main rear wall of the house. We need a report and recommendation as to possible repairs.

Requirements:
- Professional surveyor experience
- Expertise with brick structures
- Provide comprehensive report with recommendations

Ideal skills and experience:
- Structural engineering background
- Previous brick wall assessment projects
- Strong analytical reporting skills