The phrase "trialled by" is correct and usable in written English.
It is used when something is tested or evaluated. For example: The new mathematics curriculum was trialled by students in select classrooms.
This is already being trialled by police in London.
There are reasons to give some cars priority, and that's being trialled by Newcastle.
Ahok's lawyer told reporters on Tuesday the governor is being trialled by the mob.
Such bonds have already been trialled by the European Commission in Brussels.
These tariffs are already popular in the USA and are being trialled by British Gas in the UK.
One version of Dart is currently being trialled by three police forces, and has already been bought by Staffordshire police.
A wall designed to soak anyone who tries to urinate on it is being trialled by a London borough council.
Merging the most ethnically segregated schools – an approach trialled by Oldham council after the 2001 riots – may be one way forward.
IPsoft's Amelia, a virtual service desk employee, is being trialled by oil industry companies, such as Shell and Baker Hughes, to help with employee training and inquiries.
But only some body cameras allow sharing of footage at the street level: the cameras being trialled by the Metropolitan Police Service do not.
In other, lighter, IPL news, the MCC's pink ball is to be trialled by three of the league's franchises during net sessions.
