As Baffman said, a quick search shows
this site...
collected September 2011
Messages spreading across social networking site Facebook assert that the Royal British Legion - Britains leading charity for people and families involved with the Armed Forces - are not selling poppies in certain areas because it would offend minorities.
The rumours are totally false and have circulated both in 2011 and 2012 as Armistice Day approaches. There is simply no evidence or verifiable sources to back up the claims made in the rumour. In fact the rumour bears a striking resemblance in how it is worded to an earlier hoax that circulated during the run up of the World Cup in 2012 that claimed England fans were being banned from wearing England football shirts because it was offensive to minorities. This rumour was also totally false.
There was an incident in 2011 where the Royal British Legion were unable to collect money in certain areas of Birmingham but this was because of licensing issues set by the local council which were eventually resolved, nothing to do with minorities.
Also in 2011 various stores were criticised for not allowing their staff to wear poppies as it did not adhere to uniform codes (here and here.), however those high profile cases were also resolved, and again at no point did any of these cases have anything to do with minorities.