robertUSA,
The Schwab account is similar to what someone residing in the States would have, including the use of SSN for reporting to IRS. Everything is held in USD. It's possible to buy foreign shares if they are traded on US-based exchanges (e.g. the ADR of a company like Novartis)
It is not necessary to include this account on FBAR because the funds are in the States and the IRS receives the 1099 information.
I get a 1099 "composite" -- including 1099-DIV (ordinary/qualified dividends, capital gains distributions, foreign taxes paid, federal income tax withheld, etc), 1099-INT (interest) and 1099-B (proceeds from Broker Transactions). The Broker Transactions are clearly identified for completing Form 8949 (i.e. whether or not basis was reported to IRS).
Because all transactions are online (individually and on monthly statements), it is easy to pull off interest and dividends for HMRC's April 6 - April 5 tax year.