IMO, the seasonal comments have probably covered it on this one. '09 hops superior over '10 (this thread was started in '08 anyway) etc. etc.
In regard to metallic flavour (in commercially bottled and distributed beer) try (it in) a glass. Are you necking it? Does the metallic dissipate in glass? If so, probably cap taint (affecting neck and point of contact with lips).
Is the metallic quality noticeable in flavour, aroma or both? Often, metallic flavour will remain on the palate, so If you've just necked it, give the beer a rest.. switch to another beer (or food) and revisit a few hours later, in glass only (or, at least glass, first). Often, cap taint and possibly fill level (or handling where the product is stored incorrectly on side and beer has come in contact with the cap for an extended period of time) can impart cap taint, or metallic flavour.
Persons stating draught superior over bottle may also be onto something in regard to filtration. Perhaps LCPA is filtered 5 micron (Lenticular) for draught and sterile filtered for bottle.
Point is, threads like these incl. has Hargreaves Pale changed, Hightail has changed whatever are better directed to the brewers (in person or via phone, email) who can directly address. Having said that, there's nothing wrong with public scrutiny either but I often wish persons stating this or that would include point of purchase, bottled on date (if available), expiry date, best before date, etc. which is the first thing the brewers (or breweries) will ask you if you ring to complain. It's all about chasing the batch which puts a place and time to standard operating procedure, the method of distribution, the distributor on down the line.
No affil btw and cheers
reVox