Apparently it is not possible to email the vast majority of Peers at the House of Lords because they do not have offices or email addresses. However,the public are welcome to contact Members of the House of Lords. Please note that the Lords do not represent geographic areas (constituencies) so you will not have a specific Lord for your area, as you do with MPs.
The best way to contact a Lord is by writing to them.
Letters should be addressed to individual Members at
The House of Lords, London, SW1A 0PW.
Here is how to address your letter, XXX is replaced by the Peer's surname.
Baron (Lord)
Beginning of letter ... Dear Lord XXX
End of letter ... Yours sincerely
Envelope ... The (Rt Hon. the) Lord XXX
Baroness
Beginning of letter ... Dear Lady XXX
End of letter ... Yours sincerely
Envelope ... The (Rt Hon. the) Baroness XXX
Here is a list of the crossbench Peers.( Peers in the House of Lords who do not take a party whip and sit on the Crossbenches.)
UK Parliament - Crossbench Members
There is no time to waste. Pick a Peer and get your pen and paper out and let them know what you think!