blue smoke on start up

[ZSZRANDRF900]

so last weekend i drove from birmingham to silverstone and back, only at a steady 75 on the motorway and all gauges were ok, nothing to really set it aside from any other trip anywhere. then this weekend i started the Zed to get her out of the garage, and on start up, i noticed some blue smoke in the exhaust gas for the first 1 or 2 seconds, as soon as she was running properly after that initial rev they always do on start up she was fine. its the v6 lump, do i worry?