Tomato plant suffering from the cold

Unfortunately one of my tomato plants wasn't looking too healthy on the afternoon of the 19th March.

The hot water in the tandoori pot has generally kept the mini-greenhouse from freezing, but one of the cherry tomato plants was close to the side and in the path of some cold air coming in.

Around 5pm I moved this plant from the greenhouse to the windowsill.

An few hours later it had perked up a bit.