Just had a look on Google Maps. The site is now Hyde Park House & the offices are occupied by Aviva. The best way to find it is to google map 'British Heart Foundation', St Matthews St Ipswich then scan to the right!!!!! At least, that's how I did it!
Noted on the maps that the road there is referred to as St Matthews St - it isn't, it's Crown St!
Where the BHF is, there was a pub called 'The Rainbow' - the first murder in Ipswich that I can remember, took place there!!
Hephzibah