#resImage_307 {
    display:block;
    overflow:hidden;
    background-image:url('https://perform.campden.school.firthdesign.co.uk/assets/images/a/image-10-5eb99cc9.jpg');
    background-repeat:no-repeat;
    background-position:center center;
        width:100%;
    background-size: cover;
        height:450px;
}
@media screen and (min-width:700px){
    #resImage_307 {
        background-image:url('https://perform.campden.school.firthdesign.co.uk/assets/images/4/image-10-5912c5e8.jpg');
                height:400px;
    }
}
@media screen and (min-width:980px){
    #resImage_307 {
        background-image:url('https://perform.campden.school.firthdesign.co.uk/assets/images/6/image-10-2451920a.jpg');
                height:400px;
    }
}
@media screen and (min-width:1400px){
    #resImage_307 {
        background-image:url('https://perform.campden.school.firthdesign.co.uk/assets/images/a/image-10-24dd1d9d.jpg');
                height:450px;
    }
}