Hi.Not sure whether anyone here can answer this specific questions but we have a mortgage in two parts and these have different rates.We can remortgage 1st part in July but 2nd in September.Is is best to wait and remortgage total?Is it always best to stay with the same provider?Should I pay fo valuation as Zoopla is showing me my house value increased by 28000.How they calculate LTV on part mortgage?Maybe someone had similar experience?