Marks & Spencer ranks #22 of 22 UK retail sites with a B (85%) quality score vs the 85% category average. 219 issues detected vs 123.7 avg. Biggest competitive gap: Security issues (24 vs 9.5 avg, +14 above peers). Competitive strengths: fewer issues than avg in UX.

Below the median — but that means clear opportunity to differentiate. Biggest ROI: fix the 24 Security issues (peers average 9.5). Start with: "JWT Token Exposed in Network Request URL".