Have had a look in my papers - i found a marriage of a Thomas William Idle in June Quarter 1890 in the Reg District of Hendon ( ref 3a 286). I have lots of details of the Idle family and would be happy to look through if you wish. If this is your TWI ( and he seems to be the only TWI I have for that period, you should be able to obtain the Marriage certificate from St Catherines House. I tried to find a birth for him approx 1870 but the closest I could find was in 1862 in reg Dist of St Georges Square ( London area I believe). If I can help further do mail me.