Could someone be so kind as to give me the delay code for BA226 from ATL to LHR on 15th July please?

I'm assuming it's going to be missing equipment due to late arrival of incoming aircraft (which would be delayed due to weather) which since it's a knock-on it should be eligible for a compensation claim?
The flight landed an hour late at 12:35 on 16th, meaning I missed by 13:20 to Glasgow and as they couldn't find me two seats on any of the subsequent Glasgow flights that day (potentially unless I hung around the airport till 22:00 on standby), so put me in a T4 hotel and got me on the 7:15 the following day, making for a total delay of around 18 hours!