- Sharron runs a hair dresser business. A year ago, she took on Allen as an apprentice and paid him an apprentice salary.

- Local hairdressers in the area were trying to entice Allen to work for them for much better pay than he was getting from Sharron.

- When Sharron became aware of this, she told Allen that if he stuck with her business for another year, she would let him take it over and share the business profits with him.

- Allen decided to keep working with Sharron, despite knowing that other hairdressing opportunities were available to him.

- A year later, Sharron retired. She left her business to a friend called Dimietri who had been working as a hairdresser at another salon, he was more experienced and would generate business using his connections.

- Allen confronted Sharron about her promise, but Sharron brushed him off and said Allen did not provide any consideration for the promise.

Please advise Allen whether he can enforce the promise made by Sharron, use case law to support your answer.