| Code | Name | High | Low | Close | Volume | Change |
| YAU | Yamana Gold Inc Com Shs Npv | 727.0 | 704.5 | 727.0 | 1,574 | 0.0 |  | 0.00 |
| YBS | YORKSHIRE BUILDING SOCIETY 5.649% PERM | 63.50 | 63.50 | 63.50 | 0 | 0.00 |  | 0.00 |
| YCI | YANGTZE CHINA INVESTMENT LTD ORD USD0.10 | 0.4850 | 0.4850 | 0.4850 | 0 | 0.0000 |  | 0.00 |
| YCO | YCO GROUP PLC ORD GBP0.0035 | 12.00 | 12.00 | 12.00 | 0 | 0.00 |  | 0.00 |
| YELL | Yell Group | 44.90 | 42.77 | 44.15 | 10,000,510 | 1.19 |  | 2.77 |
| YGH | YINGGAO HOLDINGS PLC ORD GBP0.005 | 1.200 | 1.200 | 1.200 | 0 | 0.220 |  | 22.45 |
| YMBA | | 80.00 | 75.00 | 80.00 | 0 | 5.00 |  | 5.88 |
| YNGA | Young & Co Brews 'a' | 475.0 | 475.0 | 475.0 | 5,500 | 5.0 |  | 1.04 |
| YNGN | YOUNG & CO'S BREWERY NON.V ORD GBP0.50 | 402.5 | 402.5 | 402.5 | 0 | 0.0 |  | 0.00 |
| YOU | YOUGOV ORD GBP0 | 51.03 | 50.50 | 50.50 | 19,063 | 0.05 |  | 0.10 |
| YSP | Your Space | 26.00 | 20.00 | 23.00 | 0 | 0.00 |  | 0.00 |
| YUJ | YUJIN INTL LTD ORD NPV | 48.00 | 48.00 | 48.00 | 0 | 0.00 |  | 0.00 |
| YULC | Yule Catto | 164.0 | 155.2 | 158.3 | 37,420 | 1.8 |  | 1.09 |