Thank you all for the welcome :) I am brewing the Festival Razorback IPA kit. I started it on Saturday evening. I went out Sunday afternoon and I could see the water level in the airlock was moving, suggesting that pressure was building up. Got home just now (Monday evening) and the cap had blown off (I can't have put it on correctly). Should I be okay? It is bubbling away nicely at the moment though.
I agree, that is what appeals to me about this hobby, something I can do occasionally. I don't drink that much so I will probably only do a few brews a year but I am enjoying it so far :)