#resImage_657 {
    display:block;
    overflow:hidden;
    background-image:url('https://greatstbarts900.firthdesign.co.uk/assets/images/f/5-plans-aeb95c48.jpg');
    background-repeat:no-repeat;
    background-position:center center;
        width:100%;
    background-size: cover;
        height:300px;
}
@media screen and (min-width:700px){
    #resImage_657 {
        background-image:url('https://greatstbarts900.firthdesign.co.uk/assets/images/b/5-plans-89a4cbb9.jpg');
                height:400px;
    }
}
@media screen and (min-width:980px){
    #resImage_657 {
        background-image:url('https://greatstbarts900.firthdesign.co.uk/assets/images/a/5-plans-c09c834e.jpg');
                height:420px;
    }
}
@media screen and (min-width:1400px){
    #resImage_657 {
        background-image:url('https://greatstbarts900.firthdesign.co.uk/assets/images/c/5-plans-f677ebd1.jpg');
                height:420px;
    }
}