Tracked profit warning prices can be seen in this table:

Please note, this is not a trading system! I rarely purchase shares off the back of a warning, even the ones that are rated 5/5. Price at warnings are only approximate, and tend to be very volatile. My arbitrary point is to use the lowest price hit in the first hour of market open. For inclusiveness, the date and Stockopedia Stockrank (SR) are also recorded. Average return excludes dividends which may have been paid since.