I think it has to be said that this arrangement could result in a lot of problems for you and the pub, including the pub potentially losing its license to sell.
Indeed, a retailer cannot legally serve unlicensed, untaxed beer and homebrewers cannot legally receive any compensation (not just monetary) for their beer.
There have been several recent incidents where retailers have been caught serving unlicensed beer from local homebrewers. The result has been much greater scrutiny of the homebrewing community by state alcohol control regulators.
OK, appreciate the feedback and I'll share back accordingly. Didn't realize my not compensated would potentially impact the retailer.