Tripped the anchor with alderney ring set up, pulled anchor in midship over the gunnal on chanbilly into rhino bucket on deck. Unclip the bouy and left anchor in the bucket on deck just incase but didn't put new cable ties on. So heading in chatting to Ady explaining we nip pass the end of Hengistbury head groyne about 50ft away but I don't see the point because if anything goes wrong it's then time critical so passed about quarter mile off then within couple of minutes the boat went hard to port or starboard, correcting the steering but not responding as I was expecting. 1st thought was I'd run over pot buff or line and it was around the leg/props and pulling us back into neutral and ady went to see if we had caught something as i lifted leg up, no all clear he said Hmmmm I went from lock to lock on the wheel and ask ady is it moving? Only a little he said we swapped positions and I called are you moving the wheel? yes ady replied! Straight back into the wheelhouse to share the news we've lost steering and to grab cable ties to retrip the anchor. Anchor out boat save called coastguard at 17.27 explained situation and they said they'd put Pan pan couple of times with 10mins intervals and be back in touch. I did say only other vessels in sight were sailing boats, so I didn't hold out much hope. A young lad who works on mudeford ferry came out in his 5m rib and offer a tow but I explained we're 2.5ton 27ft and the boat suffers from the bow, wheelhouse catching the wind so I would prefer to wait for the lifeboat he also agreed. At this time sun was setting and all 3 of us were wondering why the lifeboat hadn't been tasked already (time approx 19.00) Coastguard kept asking if we could arrange a commercial tow but I explained that if I could it would be well into darkness which isn't ideal. 8pm after speaking to Coastguard again they tasked mudeford lifeboat which promptly arrived took us under tow and back to my mooring up the river, which we arrived at 22.00. Today I've been on Chanbilly and found bracket holding power steering has broken on the weld so fingers crossed 🤞 it's a very easy fix