Magic Mug Ltd designs and manufacture mugs. They have recently produced2,000 mugs bearing a slogan saying 'We support the NHS' and a rainbow logo. On15 July at 2.00 pm, Magic Mug Ltd posted on their social media account that the NHS mugs are for sale at75p per mug.

Betty sees the social media postwhile using her phone, travelling on a train. Shee-mails Magic Mug Ltd at 3.00 pm on 1^stJuly askingifshe could buy500 mugs at 50p each.Magic Mug Ltd see that e-mail but do not reply.

A national caf chain, Tasty Treats, wants tobuy all2,000 mugs to use in their cafes to show their support for NHS workers.They send one of their drivers that afternoon as soon as they see the social media post. The van driver arrives at MagicMug depot at 4.30 pm and they pay for the 2,000 mugs and the driver takes them away.

At 5.00 pm Betty visits the Magic Mug Ltd depot and tries to pay 250 for the 500 mugs. Magic Mug'ssales manager explains that they have just been sold and they have none left. Betty claims she had a contract with them made before they sold them to Tasty Treats.

Advise Magic Mug on whether an enforceable contract was made with Betty.