Hi Steve. Really, don't worry about it, you are a caring considerate, hardworking soul, I can tell that just by your postings on here, I'm sure anyone who knows you well will fully understand that. You really have nothing to worry about Steve, call the manager at the charity and just say you were busy - you're young, you work, these things happen and no one will think the worse of you. It's not like you are someone who always lets people down are you?
How did the coffee morning go?
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