IB LLC (US) is forcing all customers trading non-US derivatives to open subaccounts with IB.UK as this type of instruments won't be tradeable any longer through an IB LLC account.Deadline was April 15. I appears that IB.UK will act from now on in a dual function: For US-side traded products it will act as introducing broker to carrying broker (self-clearing) IB LLC.As SIPC and excess SIPC protection is attached to the clearing firm,securities segment accounts opened with IB.UK trading US-side products should have the same account protection as accounts opened with IB.LLC US. This is confirmed by the fact that the IB regional U.K website shows exactly the same account protection provisions as the U.S site. The big difference,however,will be from now on,if IB.UK acts as carrying broker/clearer for the non-US derivatives (securities related like Estx50 or ODAX)traded in the now obligatory Ib.UK subaccounts: IB has stated clearly that these new accounts won't enjoy any longer the account protection they had when exactly the same products were traded in a IB.LLC -based account (except futures,options on futures,forex which anyway aren't SIPC protected). This means for IB customers who have been migrated by force to IB.UK,that they have been deprived of 99.75% of the hitherto existing account protection (30.5 mio USD SIPC plus excess SIPC (Lloyd's) vs. 50 K GBP. And IB has the cheekiness to sell this forced account change (customers who don't accept won't be able to trade these non-US derivatives anymore) as an improvement.