No without interest unfortunately. However, my expectation was that I would recieve a smaller amount, because the FOS said the underlying prices would differ from the quotes ThinkMarkets gave me. But then it makes me wonder why they paid me the full amount...
… guess good enough, anyway on companieshouse reg. you will find most heavy weight brokers, check their financial statements etc…. and stay clear of bucket shops, needing to grab client funds
https://beta.companieshouse.gov.uk/company/09042646/filing-history?page=1