bˈɪldɪŋ ðə lˈaɪn wʌz tʃˈæləndʒˌɪŋ, wɪð pɹˈɑːbləmz æɾ ˈɪpswɪtʃ wɪð tˈʌnəl kənstɹˈʌkʃən ænd æt stˈoʊmɑːɹkˌɪt wˌɛɹ ðə lˈoʊkəl mˈɑːɹʃ swˈɔloʊd ˌʌp ɐ lˈɑːt ʌv mətˈɪɹiəl wɪð tˈɛst pɹˈoʊbz fˈaɪndɪŋ ðə bˈɑːɡ wʌz ˈeɪɾi fˈiːt dˈiːp!
Building the line was challenging, with problems at Ipswich with tunnel construction and at Stowmarket where the local marsh swallowed up a lot of material with test probes finding the bog was 80 feet deep!