Statistics for other years:

WriteToThem.com Zeitgeist 2015–2016

WriteToThem doesn’t just cover MPs. In 2015–16, WriteToThem users sent a total of 203,429 messages to their elected (and unelected) representatives, including 113,245 to local councillors, MEPs, Lords, and members of regional assemblies.

Which elected body* had the most responsive members in 2015–16?
(* and the House of Lords)

Rank Elected body Response rate (in 2 to 3 weeks) * People writing for first time † Messages sent
1.Welsh Assembly Members63% (67 out of 106)41% (41 out of 101)1,457
2.Members of the Scottish Parliament56% (408 out of 725)35% (229 out of 661)6,031
3.Councillors51% (2,258 out of 4,439)49% (1,915 out of 3,916)39,043
4.House of Commons50% (24,906 out of 50,175)35% (15,849 out of 44,974)90,184
5.Members of the European Parliament47% (506 out of 1,068)40% (382 out of 958)54,997
6.Northern Ireland Assembly Members45% (80 out of 178)34% (52 out of 152)3,828
7.London Assembly Members35% (40 out of 113)51% (42 out of 83)5,981
8.House of Lords28% (188 out of 672)35% (201 out of 574)1,908
 Total / average50% (28,453 out of 57,476)36% (18,711 out of 51,419)203,429

* Measured by survey of all users, asking 2 to 3 weeks after sending the message if they have got a response yet.
† Measured by survey of all users, asking if this is the first time they have written to an elected representative of any kind.