- [S324] Lansdell family tree, Judith Lansdell, (March 1999;).
recorded as Les Ayres
- [S111] Civil Registration Birth Indexes, General Register Office, (1837-;), birth registration of Gladys D M Lansdell, Willis, Islington 1b 245, December quarter 1917 (Reliability: 2).
- [S112] Civil Registration Death Indexes 1837-, General Register Office, death registration of Gladys Daisy M Ayers, b.30 Sep 1917, April 2002, Oxfordshire J01D 6951J 191.
- [S205] FreeBMD, (www.freebmd.org.uk;), marriages of Joseph V Lansdell and Martha E Willis share reference Islington 1b 546, June quarter 1911 (Reliability: 2).
- [S113] Civil Registration Marriage Indexes, General Register Office, (1837-;), marriage of Gladys D Lansdell, Ayers (no match for groom found in index), Barnet 3a 2802, June quarter 1946 (Reliability: 2).