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.
If you do use it as a system, I would advise starting small and purchasing via somewhere such as Trading212 which greatly reduces the transaction fees.
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.
Most warnings are captured but this is not a comprehensive list. Multiple warnings are ignored. Some also might not be present if I had skimmed through an update but overlooked something, as sometimes firms can warn on profits without referencing it as such.
Average return excludes dividends which may have been paid since.