"Christmas will be a difficult time without April among us," her parents said in a statement released today.
"We are coming to terms with the fact that out baby girl has been taken from us."
"We realise this is a big news story, but to us it is our lives," they added.
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Ministers are also looking at schemes such as “lock-in agreements” to reduce the 250,000 sales that fall through annually.
Staff have racked up hundreds of thousands of dollars in fees as Robert Mueller and House and Senate committees probe Moscow’s meddling.
It is "clear" ministers cannot proceed with the current Bill, Sir Keir said, threatening to "work with all sides" to ensure revisions.