I would up the tren to 50mg Per day or 100mg EOD.
Some find winny to make their joints hurt, which is not good for a cycle where max strength gain is the goal.
Is that 300mg prop per week? I think you could do with a bit more test than that, 500mg would be better IMO.
The BPC is the best untested fed in the UK, if you are interested in lifting against the best, like Porky
I have to agree with Pork, despite all the weird and wonderful combos out there, test and tren is very hard to beat and the staple of most strength athletes cycles.