Tree

There are lots of unusual trees on the campus which are not native species and I have no idea what this one is but I like the prickly fruit or seed - ?  
Our church service starts up again tomorrow, the first since lockdown.  The maximum number allowed in is 50 and we had to book beforehand, so it is going to be a strange experience all round especially as there will be no singing.  I assume we will have some music but we will all have to resist the temptation to sing along!