Re opening a blocked up doorway

[Studio23]

Hi.
I would like to re open a doorway between kitchen and dining room which was bricked up some years ago. The doorway is in a supporting wall but still has the original timber lintel. Local building control suggested that there should be no reason not to do this but I am unsure if the old lintel is sufficient.

[fozzy_brick]

hi there if the lintel looks rotted or weak or shows obvious signs that its degraded, then change, however it mite be worth just changing it and putting in a standard concrete lintel anyway there cheap enough and will last longer, easy enough to do.