My medway super won't light after having gas cut off for a week?

Hi everyone,

Recently i had to have the main gas supply to my house cut because of a gas leak on a faulty cooker. Since having the gas back on my Main Medway Super wont ignite. In the past i have had to reignite the boiler by holding down the "on" button for a few seconds and then pushing the "ignite" button to get the pilot to light. After countless attempts i am not sure what to do and British gas have quoted me £210 to have it fixed :s Is there something which i could try or has someone had a similar problem? Any help you provide is much appreciated. Thanks in advance :)

Kind Regards

Nathan