Which smartphone should I buy for £250 or less?

Robert needs a new phone, as the battery in his Huawei Y300 doesn’t last long enough anymore. He wants a robust, cheap smartphone with a good battery life that he can buy outright – but Jack Schofield thinks he should wait ...
I have a Huawei Y300, and the battery life is down to about 24 hours even with minimal use, so I’m thinking about changing it. I don’t want a phone contract, so I need something I can buy outright for around £250 or less. Other than that, I have two ideas of