TY - JOUR TI - Understanding third parties at Westminster: The SNP in the 2015 parliament N1 - Politics, 38(4), 443–457 JF - Politics AU - Thompson, Louise DO - 10.1177/0263395717740585 PY - 2018 EP - 457 SP - 443 SN - 0263-3957 SN - 1467-9256 IS - 4 VL - 38 ER -