Finally !!, got the Oath invite for 1 May 2019 ( 8.30 in the morning today) , test was on 14 Mar 2019 ( Decision Made next day). Long painful journey of 19 Months comes to an end. All the best to all. I hope you also get this joy soon !!
No , not in this case when you are chasing them for your status ( nothing happened for so long type of questions), but I think it does work when you need to reschedule you test etc.
I applied in Sep 2017, its 12 month running now and NO Test invite yet, called them so many times, they say all background checks are done and nothing to be done from your side. waiting for 12 months to complete and then will approach my MP.