u/Head-Annual-1799

Hello! A work colleague has gone on holiday and asked me to look after this tomato plant (var. Black Opal, cordon type) I don't think it's very well! I've watered it and given a seaweed feed but it's just looking worse and worse every day. It also seems to have lost its growing tip at some point in its short life. I'm thinking it needs to be either outside, or in a much bigger pot, and given support. I really don't want it to die on my watch! Is there anything I can do?