My own website dedicated to fundraising for GOSH
http://www.charliewoodheartappeal.org.uk/
You will find lots more info about Charlie and our fundraising too!
A site i use myself, very helpful and i recommend it
http://www.heartline.org.uk/
British Heart Foundation http://www.bhf.org.uk/
Brompton Fountain http://www.thebromptonfountain.org.uk/
CCAD http://www.ccad.org.uk/congenital
Children's Heart Association http://www.heartchild.info/cha/index.php
Children's Heart Federation (CHF) http://www.childrens-heart-fed.org.uk/
Children's Heart Institute http://childrensheartinstitute.org/
Cardiac Risk In the Young (C-R-Y) http://www.c-r-y.org.uk/
CHD-UK http://www.congenital-heart-defects.co.uk/
ECHO (Evelina Children's hospital) http://www.echo-evelina.org.uk/
GUCH http://www.guch.org.uk/
Healthtalk Online (formerly Dipex) http://www.healthtalkonline.org/hear..._Heart_Disease
Heartline Association (Main Website) http://www.heartline.org.uk/
Heartlink http://www.heartlink-glenfield.org.uk/
Little Hearts Matter http://www.lhm.org.uk/
PedHeart http://www.pedheart.com/?id=home
Sibs (for siblings of children with special needs) http://www.sibs.org.uk/
South West Children's Heart Circle - Bristol Hospital http://www.heartcircle.org
Heartbeat Northern Ireland http://www.heartbeatni.co.uk/
CHD Northern Ireland http://www.chd-ni.co.uk/
Info on Ebstein's Anomaly http://www.ebsteins.org/
Tiny Tickers Charity http://www.tinytickers.org/
Raising awareness of Heterotaxy Syndrome http://heterotaxy.org/default.aspx
A private centre with knowledgable experts under Professor Kypros Nicolaides http://www.fetalmedicine.com/fmc/