Anyone got an idea of how long that will take? I added it to antpool and viabtc tx accelerators. Is this likely that I'm going to have to use btc.com accelerator to get this transaction through, don't want it to be stuck August 1st 
Any advice would be greatly appreciated
Looks like "just under 2 hours" was the answer to your question... "Included In Blocks 477796 ( 2017-07-27 11:25:53 + 114 minutes )" Any advice would be greatly appreciated
I see BTC.com mined it... did you give up waiting and use the BTC.com accelerator? Seems like AntPool and ViaBTC weren't having much luck finding a block around the time your transaction was in the mempool...