Remedial wall ties by Brick Tie 

Remedial wall ties - a basic guide on types and suitability by Yorkshire's answer to wall tie corrosion; Brick-Tie Limited.
Mechanical, friction fix, grouted and sock anchors are covered in this short video presented by Brick Tie managing director Bryan Hindle.
Bryan also mentions the importance of choosing the correct type of remedial wall tie, the relevance of existing cavity wall insulation and essential proof testing during wall tie replacement.