Frequent traveller Joey Devilla reports that the Brits are confiscating PENS at the gate — not at security, but at the gate, as part of the boarding process:

Another thing they don’t tell you — in fact, they don’t tell you until the search at the gate: they won’t let you bring a pen onto the plane. I only lost a ball-point pen which I’m pretty sure came from Tucows’ office supply closet. Others were less fortunate; in the bin where confiscated pens were being collected, I saw a at least a dozen “executive” pens, including Crosses and Mont Blancs. If you’re accustomed to carrying an expensive pen, do not take it with you!

Without pens, we had nothing with which to fill out the immigrations and customs forms required for international flights arriving at their first port of entry to the United States. We ended up — all 172 of us — sharing the chief flight attendant’s pen, passing it from row to row. (Emph. mine.)

Stupid, stupid, stupid.